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CY7C65640
CY7C65640 TetraHubTM High-speed USB Hub Controller
Cypress Semiconductor Corporation Document #: 38-08019 Rev. *C
*
3901 North First Street
*
San Jose, CA 95134 * 408-943-2600 Revised December 5, 2002
CY7C65640
TABLE OF CONTENTS 1.0 TETRAHUBTM FEATURES ............................................................................................................. 4 2.0 INTRODUCTION ............................................................................................................................. 5 2.1 2.2 2.3 2.4 2.5 TetraHub Architecture ................................................................................................................ 5 USB Serial Interface Engine (SIE) ............................................................................................. 5 Hub Controller ............................................................................................................................ 6 Hub Repeater ............................................................................................................................. 6 Transaction Translator ............................................................................................................... 6
3.0 APPLICATIONS .............................................................................................................................. 6 4.0 FUNCTIONAL OVERVIEW ............................................................................................................. 6 4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8 System Initialization ................................................................................................................... 6 Enumeration ............................................................................................................................... 7 Multiple Transaction Translator Support .................................................................................... 7 Downstream Ports ..................................................................................................................... 7 Upstream Port ............................................................................................................................ 7 Power Switching ........................................................................................................................ 7 Over-current Detection ............................................................................................................... 8 Port Indicators ............................................................................................................................ 8
5.0 PIN CONFIGURATION ................................................................................................................... 9 6.0 PIN DESCRIPTION TABLE .......................................................................................................... 10 7.0 DEFAULT DESCRIPTORS ........................................................................................................... 12 7.1 7.2 7.3 7.4 7.5 7.6 7.7 7.8 Device Descriptor ..................................................................................................................... 12 Configuration Descriptor .......................................................................................................... 12 Interface Descriptor .................................................................................................................. 12 Endpoint Descriptor ................................................................................................................. 13 Interface Descriptor .................................................................................................................. 13 Endpoint Descriptor ................................................................................................................. 13 Device Qualifier Descriptor ...................................................................................................... 13 Hub Descriptor ......................................................................................................................... 14
8.0 CONFIGURATION OPTIONS ....................................................................................................... 14 8.1 Default - 0xD0 Load ................................................................................................................. 14 8.2 Configured - 0xD2 Load ........................................................................................................... 15 9.0 SUPPORTED USB REQUESTS ................................................................................................... 16 9.1 Device Class Commands ......................................................................................................... 16 9.2 Hub Class Commands ............................................................................................................. 17 10.0 UPSTREAM USB CONNECTION ............................................................................................... 19 11.0 DOWNSTREAM USB CONNECTIONS ...................................................................................... 19 12.0 LED CONNECTIONS .................................................................................................................. 19 13.0 SAMPLE SCHEMATIC ............................................................................................................... 20 14.0 ELECTRICAL CHARACTERISTICS ........................................................................................... 21 14.1 Absolute Maximum Ratings ................................................................................................... 21 14.2 Operating Conditions ............................................................................................................. 21 14.3 DC Electrical Characteristics ................................................................................................. 21
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TABLE OF CONTENTS (continued) 14.4 AC Electrical Characteristics .................................................................................................. 22
14.4.1 Serial Peripheral Interface ............................................................................................................ 22 14.4.2 Eye Diagram ................................................................................................................................ 22
15.0 ORDERING INFORMATION ....................................................................................................... 23 16.0 PACKAGE DIAGRAMS .............................................................................................................. 23 16.1 Quad Flat Package No Leads (QFN) Package Design Notes ............................................... 24 LIST OF FIGURES Figure 2-1. Block Diagram ..................................................................................................................... 5 Figure 5-1. 56-pin Quad Flat Pack No Leads (8 mm x 8 mm)) .............................................................. 9 Figure 10-1. USB Upstream Port Connection ...................................................................................... 19 Figure 11-1. USB Downstream Port Connection ................................................................................. 19 Figure 12-1. USB Downstream Port Connection ................................................................................. 19 Figure 13-1. Sample Schematic .......................................................................................................... 20 Figure 16-1. Cross-section of the Area Underneath the QFN Package .............................................. 24 Figure 16-2a. Plot of the Solder Mask (White Area) ............................................................................ 24 Figure 16-2b. X-Ray Image of the Assembly ....................................................................................... 24
LIST OF TABLES Table 4-1. Table 4-2. Table 6-1. Table 9-1. Table 9-2. Table 9-3. Table 9-4. Table 9-5. Automatic Port State to Port Indicator Color Mapping .......................................................... 8 Port Indicator Color Definitions in Manual Mode .................................................................. 8 Pin Assignments ................................................................................................................. 10 Device Class Requests ...................................................................................................... 16 Hub Class Requests ........................................................................................................... 17 Hub Class Feature Selector ............................................................................................... 18 Test Mode Selector for Feature Selector PORT_TEST (0x21) .......................................... 18 Port Indicator Selector for Feature Selector PORT_INDICATOR (0x22) ........................... 18
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CY7C65640
1.0
* * * * * * * * * *
TetraHubTM Features
USB 2.0 hub 4 downstream ports Multiple transaction translators - one per downstream port for maximum performance VID, PID and DID configured from external SPI EEPROM 24-MHz external crystal Small package--Quad Flat Pack, No Leads (QFN) Integrated upstream pull-up resistor Integrated downstream pull-down resistors for all downstream ports Integrated upstream and downstream series termination resistors Configurable with external SPI EEPROM -- Number of Active Ports -- Number of Removable Ports -- Maximum Power -- Hub Controller Power -- Power-On Timer -- Overcurrent Timer -- Disable Overcurrent Timer -- Compound Device -- Enable Full Speed Only -- Disable Port Indicators -- Gang Power switching -- Enable Single TT Mode Only -- Enable NoEOPatEOF1
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2.0 Introduction
Cypress's TetraHubTM is a high-performance Universal Serial Bus (USB) 2.0 Hub. The Tetra architecture provides four downstream USB ports, with a Transaction Translator (TT) for each port, making it the highest performance hub possible. This single-chip device incorporates one upstream and four downstream USB transceivers, a Serial Interface Engine (SIE), USB Hub Controller and Repeater, and Four Transaction Translators. It is suitable for standalone hubs, motherboard hubs, and monitor hub applications. TetraHub is a self-powered USB 2.0 device. Being a fixed function USB device, there is no risk or added engineering effort required for firmware development. The developer does not need to write any firmware for their design. The CY4602 Tetrahub USB 2.0 4 Port Hub Reference Design Kit provides all materials and documents needed to move rapidly into production. The reference design kit includes board schematics, bill of materials, Gerber files, Orcad files, key applications notes and product description.
2.1
TetraHub Architecture
Figure 2-1 is a block diagram of the TetraHub Architecture.
D+
D- High-Speed USB Control Logic SPI Communication Block
SPI_SCK SPI_SD SPI_CS
USB 2.0 PHY
24 MHz Crystal
Serial Interface Engine
PLL USB Upstream Port
Transaction Translator (X4) Hub Repeater TT RAM
Routing Logic
USB Downstream Port 1 USB 2.0 Port Power Control PHY Port Status
USB Downstream Port 2 USB 2.0 Port Power Control PHY Port Status
USB Downstream Port 3 USB 2.0 Port Power Control PHY Port Status
USB Downstream Port 4 USB 2.0 Port Power Control PHY Port Status
D+
D-
PWR#[1] OVR#[1] LED
D+
D-
PWR#[2] OVR#[2] LED
D+
D-
PWR#[3] OVR#[3] LED
D+
D-
PWR#[4] OVR#[4] LED
Figure 2-1. Block Diagram
2.2
USB Serial Interface Engine (SIE)
The SIE allows the CY7C65640 to communicate with the USB host through the USB repeater component of the hub. The SIE handles the following USB bus activity independently of the Hub Control Block: * Bit stuffing/unstuffing Document #: 38-08019 Rev. *C Page 5 of 25
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* * * * Checksum generation/checking ACK/NAK/STALL TOKEN type identification Address checking
2.3
Hub Controller
The Hub Control Block does the following protocol handling at a higher level: * Coordinate enumeration by responding to SETUP packets * Fill and empty the FIFOs * Suspend/Resume coordination * Verify and select DATA toggle values * Port power control and over-current detection The Hub Controller provides status and control and permits host access to the hub.
2.4
Hub Repeater
The Hub Repeater manages the connectivity between upstream and downstream facing ports that are operating at the same speed. It supports full-/low-speed connectivity and high-speed connectivity. As per the USB 2.0 specification, the Hub Repeater provides the following functions: * Sets up and tears down connectivity on packet boundaries * Ensures orderly entry into and out of the Suspend state, including proper handling of remote wakeups
2.5
Transaction Translator
The Transaction Translator basically translates data from one speed to another. A Transaction Translator takes high-speed split transactions and translates them to full-/low-speed transactions when the hub is operating at high speed (the upstream port is connected to a high-speed host controller) and has full-/low-speed devices attached. The operating speed of a device attached on a downstream facing port determines whether the Routing Logic connects a port to the Transaction Translator or Hub Repeater section. If a low-/full-speed device is connected to the hub operating at high speed, the data transfer route includes the transaction translator. If a high-speed device is connected to this high-speed hub the route only includes the repeater and no transaction translator since the device and the hub are in conformation with respect to their data transfer speed. When the hub is operating at full speed (the upstream port is connected to a full-speed host controller), a high-speed peripheral will not operate at its full capability. These devices will only work at 1.1 speed. Full- and low-speed devices connected to this hub will operate at their 1.1 speed.
3.0
* * * * * * *
Applications
Standalone Hubs Motherboard Hubs Monitor Hub applications External Personal Storage Drives Port Replicators Portable Drive Docking Stations
4.0
Functional Overview
The Cypress TetraHub USB 2.0 Hub is a high-performance, low-system-cost solution for USB. The TetraHub USB 2.0 Hub integrates 1.5k upstream pull-up resistors for full-speed operation and all downstream 15k pull-down resistors as well as series termination resistors on all upstream and downstream D+ and D- pins. This results in optimization of system costs by providing built-in support for the USB 2.0 specification.
4.1
System Initialization
On power-up, the TetraHub will read an external SPI EEPROM for configuration information. At the most basic level, this EEPROM will have the Vendor ID (VID), Product ID (PID), and Device ID (DID) for the customer's application. For more specialized applications, other configuration options can be specified. See section 8.0 for more details. After reading the EEPROM, if BUSPOWER (connected to up-stream VBus) is HIGH, TetraHub will enable the pull-up resistor on the D+ to indicate that it is connected to the upstream hub, after which a USB Bus Reset is expected. During this reset, TetraHub Document #: 38-08019 Rev. *C Page 6 of 25
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will initiate a chirp to indicate that it is a high-speed peripheral. In a USB 2.0 system, the upstream hub will respond with a chirp sequence, and TetraHub will be in a high-speed mode, with the upstream D+ pull-up resistor turned off. In USB 1.x systems, no such chirp sequence from the upstream hub will be seen, and TetraHub will operate as a normal 1.x hub (operating at full speed).
4.2
Enumeration
After a USB Bus Reset, TetraHub is in an unaddressed, unconfigured state (configuration value set to 0). During the enumeration process, the host will set the hub's address and configuration by sending a SetCongfiguration request. Changing the hub address will restore it to an unconfigured state. For high-speed multi-TT support, the host must also set the alternate interface setting to 1 (the default mode is single-TT). Once the hub is configured, the full hub functionality is available.
4.3
Multiple Transaction Translator Support
After TetraHub is configured in a high-speed system, it will be in Single Transaction Translator mode. The host may then set the hub into multiple Transaction Translator mode by sending a SetInterface command. In multiple Transaction Translator mode, each full speed port is handled independently and thus has a full 12-Mbps bandwidth available. In single Transaction Translator mode, all traffic from the host destined for full- or low-speed ports will be forwarded to all of those ports. This means that the 12-Mbps bandwidth is shared by all full- and low-speed ports.
4.4
Downstream Ports
TetraHub supports a maximum of four downstream ports, each of which may be marked as usable or removable in the extended configuration (0xD2 EEPROM load, see section 8.2). Downstream D+ and D- pull-down resistors are incorporated in TetraHub for each port. Prior to the hub being configured, the ports are driven SE0 (Single Ended Zero, where both D+ and D- are driven low) and are set to the unpowered state. Once the hub is configured, the ports are not driven, and the host may power the ports by sending a SetPortPower command to each port. After a port is powered, any connect or disconnect event is detected by the hub. Any change in the port state is reported by the hub back to the host through the Status Change Endpoint (endpoint 1). Upon receipt of SetPortReset command from the host, the hub will * Drive SE0 on the corresponding port. * Put the port in an enabled state. * Enable the green port indicator for that port (if not previously overridden by the host). * Enable babble detection once the port is enabled. Babble consists of either unterminated traffic from a downstream port (or loss of activity), or a non-idle condition on the port after EOF2. If babble is detected on an enabled port, that port will be disabled. A ClearPortEnable command from the host will also disable the specified port. Downstream ports can be individually suspended by the host with the SetPortSuspend command. If the hub is not suspended, any resume will be confined to that individual port and reflected to the host through a port change indication in the Hub Status Change Endpoint. If the hub is suspended, a resume on this port will be forwarded to the host, but other resume events will not be seen on that port. The host may resume the port by sending a ClearPortSuspend command.
4.5
Upstream Port
The upstream port includes the transmitter and the receiver state machine. The Transmitter and Receiver operate in high-speed and full-speed depending on the current hub configuration. The transmitter state machine monitors the upstream facing port while the Hub Repeater has connectivity in the upstream direction. This monitoring activity prevents propagation of erroneous indications in the upstream direction. In particular, this machine prevents babble and disconnect events on the downstream facing ports of this hub from propagating and causing the hub to be disabled or disconnected by the hub to which it is attached. This allows the Hub to only disconnect the offensive port on detecting a babble from it.
4.6
Power Switching
TetraHub includes interface signals for external port power switches. Both ganged and individual (per-port) configurations are supported, with individual switching being the default. Initially all ports are unpowered. After enumerating, the host may power each port by sending a SetPortPower command for that port. The power switching and over-current detection of downstream ports is managed by control pins connected to an external power switch device. PWR [n]# output pins of the CY7C65640 series are connected to the respective external power switch's port power enable signals. (Note that each port power output pin of the external power switch must be bypassed with an electrolytic or tantalum capacitor as required by the USB specification. These capacitors supply the inrush currents, which occur during downstream device hot-attach events.)
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4.7 Over-current Detection
Over-current detection includes timed detection of 8 ms by default. This parameter is configured from the external EEPROM in a range of 0 ms to 15 ms for both an enabled port and a disabled port individually. Detection of over-current on downstream ports is managed by control pins connected to an external power switch device. The OVR[n]# pins of the CY7C65640 series are connected to the respective external power switch's port over-current indication (output) signals. Upon detecting an over-current condition, the hub device reports the over-current condition to the host and disables the PWR# output to the external power device.
4.8
Port Indicators
The USB 2.0 port indicators are also supported directly by TetraHub. As per the specification, each downstream port of the hub supports an optional status indicator. The presence of indicators for downstream facing ports is specified by bit 7 of the wHubCharacteristics field of the hub class descriptor. The default TeraHub descriptor specifies that port indicators are supported (wHubCharacteristics, bit 7 is set). If port indicators are not included in the hub, this should be disabled by the EEPROM. Each port indicator is strategically located directly on the opposite edge of the port which it is associated with. The indicator provides two colors: green and amber. This is implemented as two separate LEDs, one amber and the other green. A combination of hardware and software control is used to inform the user of the current status of the port or the device attached to the port and to guide the user through problem resolution. Colors and blinking are used to provide information to the user. The significance of the color of the LED depend on the operational mode of the TetraHub. There are two modes of operation for the TetraHub port indicators: automatic and manual. On power up the TeraHub defaults to Automatic Mode, where the color of the Port Indicator (Green, Amber, Off) indicates the functional status of the TetraHub port. In Automatic Mode, TetraHub will turn on the green LED whenever the port is enabled and the amber LED when it has had an overcurrent condition detected. The color of the port indicator is set by the port state machine. Blinking of the LEDs is not supported in Automatic Mode. Table 4-1 below identifies the mapping of color to port state in Automatic Mode. Table 4-1. Automatic Port State to Port Indicator Color Mapping Port Switching Powered Off With Without Off or Amber if due to an Overcurrent Condition Off Downstream Facing Hub Port State Disconnected, Disabled, Not Configured, Resetting, Testing Off Off or Amber if due to an Overcurrent Condition Enabled, Transmit, or TransmitR Green Green Suspended, Resuming, SendEOR, Restart_E /S Off Off
In manual mode, the indicators are under the control of the host, which can turn on one of the LEDs, or leave them off. This is done by a system software USB Hub class request. Blinking of the LEDs is supported in Manual Mode. The port indicators allow the user to intervene on any error detection. For example, when babble is detected on plugging in a defective device, or on occurrence of an overcurrent condition, the port indicators corresponding to the downstream port will blink green or only light the amber LED, respectively. Table 4-2 below displays the color definition of the indicators when TetraHub is in Manual Mode Table 4-2. Port Indicator Color Definitions in Manual Mode Color Definition Off Amber Green Blinking Off/Green Blinking Off/Amber Blinking Green/Amber Port State Not operational Error condition Fully Operational Software Attention Hardware Attention Reserved
Note: Information presented in Table 4-1 and Table 4-2 is information from the USB 2.0 specification table 11-6 and 11-7, respectively.
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5.0 Pin Configuration
GREEN#[4] 43 AMBER#[4] 44
SPI_SCK
PWR#[3]
OVR#[3]
PWR#[4]
OVR#[4]
SPI_SD
RESET
GND
VCC
GND
GND
56
55
54
53
52
51
50
49
48
47
46
DD-[4]
1 2 3
VCC 45
42 AMBER#[3] 41 GREEN#[3] 40 GND
DD+[4] VCC
GND 4 DD-[3] DD+[3] VCC GND DD-[2]
39 VCC 38 AMBER#[2] 37 GREEN#[2] 36 AMBER#[1] 35 GREEN#[1] 34 GND 33 VCC 32 OVR#[2] 31 PWR#[2] 30 OVR#[1]
5 6 7 8 9
DD+[2] 10 VCC 11 GND 12 DD-[1] 13 DD+[1] 14
29 PWR#[1]
15 VCC
16 GND
17 D-
18 D+
19 VCC
20 GND
21 XIN
22 XOUT
23 VCC
24 GND
25 SPI_CS
26 BUSPOWER
27 VCC
28 GND
Figure 5-1. 56-pin Quad Flat Pack No Leads (8 mm x 8 mm))
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6.0 Pin Description Table
Table 6-1 below displays the pin assignments for the CY7C65640 Table 6-1. Pin Assignments Pin 3 7 11 15 19 23 27 33 39 45 55 4 8 12 16 20 24 28 34 40 47 50 56 21 22 46 Name VCC VCC VCC VCC VCC VCC VCC VCC VCC VCC VCC GND GND GND GND GND GND GND GND GND GND GND GND XIN XOUT RESET# Type Power Power Power Power Power Power Power Power Power Power Power Power Power Power Power Power Power Power Power Power Power Power Power Input Output Input Default N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Description VCC. This signal provides power to the chip. VCC. This signal provides power to the chip. VCC. This signal provides power to the chip. VCC. This signal provides power to the chip. VCC. This signal provides power to the chip. VCC. This signal provides power to the chip. VCC. This signal provides power to the chip. VCC. This signal provides power to the chip. VCC. This signal provides power to the chip. VCC. This signal provides power to the chip. VCC. This signal provides power to the chip. GND. Connect to Ground with as short a path as possible. GND. Connect to Ground with as short a path as possible. GND. Connect to Ground with as short a path as possible. GND. Connect to Ground with as short a path as possible. GND. Connect to Ground with as short a path as possible. GND. Connect to Ground with as short a path as possible. GND. Connect to Ground with as short a path as possible. GND. Connect to Ground with as short a path as possible. GND. Connect to Ground with as short a path as possible. GND. Connect to Ground with as short a path as possible. GND. Connect to Ground with as short a path as possible. GND. Connect to Ground with as short a path as possible. 24-MHz Crystal IN or External Clock Input. 24-MHz Crystal OUT. Active LOW Reset. This pin resets the entire chip. It is normally tied to VCC through a 100K resistor, and to GND through a 0.1-F capacitor. Other than this, no other special power-up procedure is required. VBUS. Connect to up-stream Vbus to indicate that the TetraHub is connected upstream. SPI Chip Select. Connect to CS pin of the EEPROM. SPI Clock. Connect to EEPROM SCK pin. SPI Dataline Connect to GND with 15-K resistor and to the Data I/O pins of the EEPROM. Upstream D- Signal. Upstream D+ Signal. Downstream D- Signal. Page 10 of 25
26
BUSPOWER
Input
N/A
SPI INTERFACE 25 48 49 SPI_CS SPI_SCK SPI_SD O O I/O/Z O O Z
UPSTREAM PORT 17 18 13 D- D+ DD-[1] I/O/Z I/O/Z I/O/Z Z Z Z
DOWNSTREAM PORT 1
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Table 6-1. Pin Assignments (continued) Pin 14 36 35 30 29 9 10 38 37 32 31 5 6 42 41 53 54 1 2 44 43 51 52 Name DD+[1] AMBER#[1] GREEN#[1] OVR#[1] PWR#[1] DD-[2] DD+[2] AMBER#[2] GREEN#[2] OVR#[2] PWR#[2] DD-[3] DD+[3] AMBER#[3] GREEN#[3] OVR#[3] PWR#[3] DD-[3] DD+[3] AMBER#[3] GREEN#[3] OVR#[3] PWR#[3] Type I/O/Z O O Input O/Z I/O/Z I/O/Z O O Input O/Z I/O/Z I/O/Z O O Input O/Z I/O/Z I/O/Z O O Input O/Z Default Z 1 1 1 Z Z Z 1 1 1 Z Z Z 1 1 1 Z Z Z 1 1 1 Z Description Downstream D+ Signal. LED. Driver output for Amber LED. Port Indicator Support. Active LOW. LED. Driver output for Green LED. Port Indicator Support. Active LOW. Overcurrent Condition Detection Input. Active LOW. Power Switch Driver Output. Active LOW. Downstream D- Signal. Downstream D+ Signal. LED. Driver output for Amber LED. Port Indicator Support. Active LOW. LED. Driver output for Green LED. Port Indicator Support. Active LOW. Overcurrent Condition Detection Input. Active LOW. Power Switch Driver Output. Active LOW. Downstream D- Signal. Downstream D+ Signal. LED. Driver output for Amber LED. Port Indicator Support. Active LOW. LED. Driver output for Green LED. Port Indicator Support. Active LOW. Overcurrent Condition Detection Input. Active LOW. Power Switch Driver Output. Active LOW. Downstream D- Signal. Downstream D+ Signal. LED. Driver output for Amber LED. Port Indicator Support. Active LOW. LED. Driver output for Green LED. Port Indicator Support. Active LOW. Overcurrent Condition Detection Input. Active LOW. Power Switch Driver Output. Active LOW.
DOWNSTREAM PORT 2
DOWNSTREAM PORT 3
DOWNSTREAM PORT 4
Unused port DD+/DD- lines can be left floating. The port power, amber, and green LED pins should be left unconnected, and the overcurrent pin should be tied HIGH. The overcurrent pin is an input and it should not be left floating.
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7.0
7.1
Default Descriptors
Device Descriptor
The standard device descriptor for TetraHub is based on the VID, PID, and DID found in the SPI EEPROM. This VID/PID/DID in the EEPROM will overwrite the default VID/PID/DID. If no EEPROM is used, the TetraHub will enumerate with the default descriptor values as shown below: Byte 0 1 2,3 4 5 6 7 8,9 10,11 12, 13 14 15 16 17 Full Speed 0x12 0x01 0x0200 0x09 0x00 0x00 0x40 0x04B4 0x6560 0x0007 0x00 0x00 0x00 0x01 High Speed 0x12 0x01 0x0200 0x09 0x00 0x02 0x40 0xx04B4 0x6560 0x0007 0x00 0x00 0x00 0x01 Field Name bLength bDescriptorType bcdUSB bDeviceClass bDeviceSubClass bDeviceProtocol bMaxPacketSize0 wIdVendor wIdProduct wbcdDevice iManufacturer iProduct iSerialNumber bNumConfigurations 18 Bytes DEVICE_DESCRIPTOR USB specification 2.0 HUB None None 64 bytes VID (overwritten by what is defined in EEPROM) PID (overwritten by what is defined in EEPROM) DID (overwritten by what is defined in EEPROM) No manufacturer string supported No product string supported No serial string supported One configuration supported Description
7.2
Byte 0 1 2 4 5 6 7 8
Configuration Descriptor
Full Speed 0x09 0x02 0x0019 0x01 0x01 0x00 0xE0 0x32 High Speed 0x09 0x02 0x0029[1] 0x01 0x01 0x00 0xE0 0x32[2] Field Name bLength bDescriptorType wTotalLength bNumInterfaces bConfigurationValue iConfiguration bmAttributes bMaxPower 9 Bytes CONFIG_DESCRIPTOR Length of all other descriptors 1 The configuration to be used Description
7.3
Byte 0 1 2 3 4 5 6 7 8
Interface Descriptor
Full Speed 0x09 0x04 0x00 0x00 0x01 0x09 0x00 0x00 0x00 High Speed 0x09 0x04 0x00 0x00 0x01 0x09 0x00 0x01 0x00 Field Name bLength bDescriptorType bInterfaceNumber bAlternateSetting bNumEndpoints bInterfaceClass bInterfaceSubClass bInterfaceProtocol iInterface 9 Bytes INTERFACE_DESCRIPTOR Description
Notes: 1. This value is reported as 0x19 if the hub is configured in Single-TT mode. 2. This value is configured through the External EEPROM.
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7.4
Byte 0 1 2 3 4,5 6
Endpoint Descriptor
Full Speed 0x07 0x05 0x81 0x03 0x0001 0xFF High Speed 0x07 0x05 0x81 0x03 0x0001 0x0C Field Name bLength bDescriptorType bEndpointAddress bmAttributes wMaxPacketSize bInterval 7 Bytes ENDPOINT_DESCRIPTOR IN Endpoint #1 Interrupt Maximum Packet Size Polling Rate Description
7.5
I
Interface Descriptor[3]
Full Speed N/A N/A N/A N/A N/A N/A N/A N/A N/A High Speed 0x09 0x04 0x00 0x01 0x01 0x09 0x00 0x02 0x00 Field Name bLength bDescriptorType bInterfaceNumber bAlternateSetting bNumEndpoints bInterfaceClass bInterfaceSubClass bInterfaceProtocol bInterface 9 Bytes INTERFACE_DESCRIPTOR Interface Descriptor Index Alternate Setting for the Interface Number of Endpoints Defined Interface Class Interface Sub-Class Interface Protocol Interface String Index Description
Byte 0 1 2 3 4 5 6 7 8
7.6
Byte 0 1 2 3 4,5 6
Endpoint Descriptor[3]
Full Speed N/A N/A N/A N/A N/A N/A High Speed 0x07 0x05 0x81 0x03 0x0001 0x0C Field Name bLength bDescriptorType bEndpointAddress bmAttributes wMaxPacketSize bInterval 7 Bytes ENDPOINT_DESCRIPTOR IN Endpoint #1 Interrupt Maximum Packet Size Polling Rate Description
7.7
Byte 0 1 2,3 4 5 6 7 8 9
Note:
3.
Device Qualifier Descriptor
Full Speed 0x0A 0x06 0x0200 0x09 0x00 0x02 0x40 0x01 0x00 High Speed 0x0A 0x06 0x0200 0x09 0x00 0x00 0x40 0x01 0x00 Field Name bLength bDescriptorType bcdUSB bDeviceClass bDeviceSubClass bDeviceProtocol bMaxPacketSize0 bNumConfigurations bReserved 10 Bytes DEVICE_QUALIFIER Description
If TetraHub is configured for single-TT only (from the external EEPROM), this descriptor is not present.
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7.8
Byte 0 1 2 3,4
Hub Descriptor
All Speeds 0x09 0x29 0x04[4] 0x0089[4] Field Name bLength bDescriptorType bNbrPorts wHubCharacteristics 9 Bytes HUB Descriptor Number of ports supported b1, b0: Logical Power Switching Mode 00: Ganged power switching (all ports' power at once) 01: Individual port power switching (Default in TetraHub) b2: Identifies a Compound Device, 0: Hub is not part of a compound device (Default in TetraHub), 1: Hub is part of a compound device. b4, b3: Over-current Protection Mode 00: Global Overcurrent Protection. The hub reports overcurrent as a summation of all ports current draw, without a breakdown of individual port overcurrent status. 01: Individual Port Overcurrent Protection. The hub reports overcurrent on a per-port basis. Each port has an over-current status (Default in TetraHub). 1X: No Overcurrent Protection. This option is allowed only for bus-powered hubs that do not implement overcurrent protection. b6, b5: TT Think TIme 00: TT requires at most 8 FS bit times of inter transaction gap on a full-/low-speed downstream bus (Default in TetraHub). 01: TT requires at most 16 FS bit times. 10: TT requires at most 24 FS bit times. 11: TT requires at most 32 FS bit times. b7: Port Indicators Supported, 0: Port Indicators are not supported on its downstream facing ports and the PORT_INDICATOR request has no effect. 1: Port Indicators are supported on its downstream facing ports and the PORT_INDICATOR request controls the indicators. See Section 4 and 9 (Default in TetraHub). b15, ..b8: Reserved 5 6 7 8 0x32[4] 0x64
[4]
Description
bPwrOn2PwrGood bHubContrCurrent bDeviceRemovable bPortPwrCtrlMask
Time from when the port is powered to when the power is good on that port Maximum current requirement for the Hub Controller Indicates if the port has a removable device attached Required for compatibility with software written for 1.0 compliant devices
0x00[4] 0xFF[4]
Note: 4. This value is configured through the External EEPROM.
8.0
Configuration Options
Systems using TetraHub must have an external EEPROM in order for the device to have a unique VID, PID, and DID. The TetraHub can talk to SPI EEPROM that are double byte addressable only. TetraHub uses the command format from the '040 parts.The TetraHub cannot talk to `080 EEPROM parts, as the read command format used for talking to `080 is not the same as `040. The '010s and '020s uses the same command format as used to interface with the `040 and hence these can also be used to interface with the TetraHub.
8.1
Default - 0xD0 Load
When used in default mode, only a unique VID, PID, and DID must be present in the external SPI EEPROM. The contents of the EEPROM must contain this information in the following format: Document #: 38-08019 Rev. *C Page 14 of 25
CY7C65640
Byte 0 1 2 3 4 5 6 Value 0xD0 VID (LSB) VID (MSB) PID (LSB) PID (MSB) DID (LSB) DID (MSB)
8.2
Configured - 0xD2 Load
Byte 0 1 2 3 4 5 6 7 8 9 10 11 12 0xD2 VID (LSB) VID (MSB) PID (LSB) PID (MSB) DID (LSB) DID (MSB) EnableOverCurrentTimer[3:0], DisableOvercurrentTimer[3:0] ActivePorts[3:0], RemovablePorts[3:0] MaxPower HubControllerPower PowerOnTimer IllegalHubDescriptor, CompoundDevice, FullspeedOnly, NoPortIndicators, BusPowered, GangPowered, SingleTTOnly, NoEOPatEOF1 Value (MSB->LSB)
Byte 0: 0xD2 Needs to be programmed with 0xD2 Byte 1: VID (LSB) Least Significant Byte of Vendor ID Byte 2: VID (MSB) Most Significant Byte of Vendor ID Byte 3: PID (LSB) Least Significant Byte of Product ID Byte 4: PID (LSB)] Most Significant Byte of Product ID Byte 5: DID (LSB) Least Significant Byte of Device ID Byte 6: DID (LSB)] Most Significant Byte of Device ID Byte 7: EnableOvercurrentTimer[3:0], DisabledOvercurrentTimer[3:0] Count time in ms for filtering overcurrent detection. Bits 7-4 are for an enabled port, and bits 3-0 are for a disabled port. Both range from 0 ms to 15 ms. See section 4.8. Default: 8 ms = 0x88. Byte 8: ActivePorts[3:0], RemovablePorts[3:0] ActivePorts[3:0] is a bit field that indicates the corresponding port is usable. For example, a two-port hub that uses ports 1and 4 would set this field to 0x09. The total number of ports reported in the Hub Descriptor: bNbrPorts field is calculated from this. RemovablePorts[3:0] is a bit field that indicates whether the corresponding port is removable (if high). If any port is not Document #: 38-08019 Rev. *C Page 15 of 25
CY7C65640
removable, the hub should be configured as HubDescriptor:DeviceRemovable field. Default: 0xFF. Byte 9: MaximumPower This value is reported in the ConfigurationDescriptor:bMaxPower field and is the current in 2 mA intervals that is required from the upstream hub. Default: 0x32 = 100 mA Byte 10: HubControllerPower This value is reported in the HubDescriptor:bHubContrCurrent field and is the current in milliamperes required by the hub controller. Default: 0x64 = 100 mA Byte 11: PowerOnTimer This value is reported in the HubDescriptor:bPwrOn2PwrGood field and is the time in 2 ms intervals from the SetPortPower command until the power on the corresponding downstream port is good. Default: 0x32 = 100 ms Byte 12: IllegalHubDescriptor, CompoundDevice, FullspeedOnly, NoPortIndicators, BusPowered, GangPowered, SingleTTOnly, NoEOPatEOF1 Bit 7: IllegalHubDescriptor: For GetHubDescriptor request, some USB hosts use a DescriptorTypeof 0x00 instead of HUB_DESCRIPTOR, 0x29. According to the USB 2.0 standard, a hub must treat this as a Request Error, and STALL the transaction accordingly (USB 2.0, 11.24.2.5). For systems that do not accept this, the IllegalHubDescriptor configuration bit may be set to allow TetraHub to accept a DescriptorType of 0x00 for this command. Default is 0, recommended setting is 1 Bit 6: CompoundDevice: Indicates whether the hub is part of a compound device. This is reported in the HubDescriptor, wHubCharacteristics:b2. Default set to 0. Bit 5: Fullspeed: Only configures the hub to be a full-speed only device. Default set to 0. Bit 4: NoPortIndicators: Turns off the port indicators and does not report them as present in the HubDescriptor, wHubCharacteristics b7 field. Default set to 0. Bit 3: BusPowered: Indicates that the hub is not bus powered. Reported in the ConfigurationDescriptor:bmAttributes:b6 field. Default set to 0. Bit 2: GangPowered: Indicates whether the port power switching is ganged (set to 1) or per-port (set to 0). This is reported in the HubDescriptor, wHubCharacteristics field, b4, b3, b1, and b0. Default set to 0. Bit 1: SingleTTOnly: Indicates that the hub should only support single Transaction Translator mode. This changes various descriptor values. Default set to 0. Bit 0: NoEOPatEOF1 turns off the EOP generation at EOF1 in full-speed mode. Note that several USB 1.1 hosts can not handle EOPatEOF1 properly. Cypress recommends that this option be turned off for general-purpose hubs. Default is 0, recommended setting is 1. a compound device. This value is reported in the
9.0
9.1
Supported USB Requests
Device Class Commands
Table 9-1. Device Class Requests Request
GetDeviceStatus GetInterfaceStatus GetEndpointStatus GetDeviceDescriptor GetConfigDescriptor GetDeviceQualifierDescriptor GetOtherSpeedConfigurationDescriptor GetConfiguration[5]
bmRequestType bRequest
10000000B 10000001B 10000010B 10000000B 10000000B 10000000B 10000000B 10000000B 0x00 0x00 0x00 0x06 0x06 0x06 0x06 0x08
wValue
0x0000 0x0000 0x0000 0x0001 0x0002 0x0006 0x0007 0x0000
wIndex
0x0000 0x0000 0x0000 Zero or Language ID Zero or Language ID Zero or Language ID Zero or Language ID 0x0000
wLength
0x0002 0x0002 0x0002
Data
2 Byte Device Status 2 Byte Endpoint Status 2 Byte Endpoint Status
Descriptor Descriptor Length Descriptor Descriptor Length Descriptor Descriptor Length Descriptor Descriptor Length 0x0001 Configuration value
Note: 5. Only one configuration is supported in TetraHub.
Document #: 38-08019 Rev. *C
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CY7C65640
Table 9-1. Device Class Requests (continued) Request
SetCongfiguration[5] GetInterface SetInterface SetAddress SetDeviceRemoteWakeup SetDeviceTest_J SetDeviceTest_K SetDeviceTest_SE0_NAK SetDeviceTest_Packet SetEndpointHalt ClearDeviceRemoteWakeup ClearEndpointHalt
bmRequestType bRequest
00000000B 10000001B 00000001B 00000000B 00000000B 00000000B 00000000B 00000000B 00000000B 00000000B 00000000B 00000000B 0x09 0xA 0x0B 0x05 0x03 0x03 0x03 0x03 0x03 0x03 0x01 0x01
wValue
Configuration Value 0x0000 Alternate Setting Device Address 0x01 0x02 0x02 0x02 0x02 0x00 0x01 0x00
wIndex
0x0000 0x0000 Interface Number 0x0000 0x0000 0x0100 0x0200 0x0300 0x0400 0x0000 0x0000 0x0000
wLength
0x0000 0x0001 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 None
Data
Interface Number None None None None None None None None None None
9.2
Hub Class Commands
Table 9-2. Hub Class Requests Request GetHubStatus bmRequestType 10100000B bRequest 0x00 wValue 0x0000 wIndex 0x0000 wLength 0x0004 Data Hub Status (See Table 11-19 of Spec) Change Status (See table 11-20 of Spec) Port Status (See Table 11-21 of Spec) Change Status (See table 11-20 of Spec) None
GetPortStatus
10100011B
0x00
0x0000
Byte 0: 0x00 0x0004 Byte 1: Port 0x0000 0x0000
ClearHubFeature
00100000B
0x01
Feature Selectors[6] 0 or 1
ClearPortFeature
00100011B
0x01
Feature Byte 0: 0x00 0x0000 Selectors[6] Byte 1: Port 1, 2, 8, 16, 17, 18, 19, or 20 Feature Selectors[6] 22 (PORT_INDICAT OR) Feature Selector[6] Feature Selectors[6] 2, 4 or 8 Feature Selector[6] 21 (PORT_TEST) Byte 0: Selectors[8] 0, 1, 2, or 3 Byte 1: Port 0x0000 Port 0x0000
None
ClearPortFeature
00100011B
0x01
None
SetHubFeature SetPortFeature
00100000B 00100011B
0x03 0x03
0x0000 0x0000
TetraHub STALLs this request None
SetPortFeature
00100011B
0x03
Byte 0: 0x0000 Selectors[7] 1,2, 3, 4 or 5 Byte 1: Port
None
Notes: 6. Feature selector values for different feature is presented in Table 9-3 7. Selector values for different feature is presented in Table 9-4. 8. Selector values for different feature is presented in Table 9-5.
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Table 9-2. Hub Class Requests (continued) Request SetPortFeature bmRequestType 00100011B bRequest 0x03 wValue Feature Selector[6] 22 (PORT_INDICAT OR) Descriptor Type and Descriptor Index Dev_Addr, EP_Num 0x0000 TT_Flags 0x0000 TT_Port wIndex Byte 0: Selectors[8] 0, 1, 2, or 3 Byte 1: Port wLength 0x0000 None Data
GetHubDescriptor
10100000B
0x06
Hub Descriptor Length 0x0000 None None TT State None
ClearTTBuffer ResetTT GetTTState StopTT
00100011B 00100000B 10100011B 00100011B
0x08 0x09 0X0A 0x0B
Byte 0: 0x00 0x0000 Byte 1: Port Byte 0: 0x00 TT State Byte 1: Port Length Byte 0: 0x00 0x0000 Byte 1: Port
Table 9-3. Hub Class Feature Selector Feature Selector C_HUB_LOCAL_POWER C_HUB_OVER_CURRENT PORT_CONNECTION PORT_ENABLE PORT_SUSPEND PORT_RESET PORT_POWER PORT_LOW_SPEED C_PORT_CONNECTION C_PORT_ENABLE C_PORT_SUSPEND C_PORT_OVER_CURRENT C_PORT_RESET PORT_TEST PORT_INDICATOR Recipient Hub Hub Port Port Port Port Port Port Port Port Port Port Port Port Port Value 0 1 0 1 2 4 8 9 16 17 18 19 20 21 22
Table 9-4. Test Mode Selector for Feature Selector PORT_TEST (0x21) PORT_TEST Mode Description Test_J Test_K Test_SE0_NAK Test_Packet Test_Force_Enable Selector Value 1 2 3 4 5
Table 9-5. Port Indicator Selector for Feature Selector PORT_INDICATOR (0x22) Port Indicator Color Color Set Automatically as shown in Table 4-1 Amber Green Off Document #: 38-08019 Rev. *C Selector Value 0 1 2 3 Port Indicator Mode Automatic Mode Manual Mode Manual Mode Manual Mode Page 18 of 25
CY7C65640
10.0 Upstream USB Connection
The following is a schematic of the USB upstream connector.
VCC D- D+ GND SHELL 4.7 nF 250V 1 M D- D+ 2.2 F 10V 100 k
BUSPOWER
Figure 10-1. USB Upstream Port Connection
11.0
Downstream USB Connections
The following is a schematic of the USB downstream connector.
PWRx VCC
150 F 10V
0.01 F DD-[X]
D-
DD+[X]
D+
GND
SHELL
Figure 11-1. USB Downstream Port Connection
12.0
LED Connections
The following is a schematic of the LED circuitry.
3.3V GREEN#[x] 680
AMBER#[x]
680
Figure 12-1. USB Downstream Port Connection
Document #: 38-08019 Rev. *C
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CY7C65640
13.0 Sample Schematic
5V VCC D- D+ GND SHELL 4.7 nF 250V 1 M AMBER#[1] 680 BUSPOWER D- D+ 2.2 F 10V 100 k PWR1 OVR1 PWR4 PWR1 150 F 10V DD-[1] DD+[1] 0.01 F VCC D- D+ GND SHELL 3.3V GREEN#[1] 680
Power
PWR3 PWR2 PWR1
PWR2 Management OVR2 PWR3 OVR3 PWR4 OVR4
SPI_SD SPI_SCK SPI_CS
SPI EEPROM
PWR2 SPI_SD 150 F 10V DD-[2] DD+[2] 0.01 F
VCC D- D+ GND SHELL
24 MHz
3.3V
3V
2 7pF
27 pF
GREEN#[2] AMBER#[2]
680
680
XIN
BUSPOWER BUSPOWER
PWR3
VCC1 VCC2 VCC3 VCC4 VCC5 VCC6 VCC7 VCC8 VCC9 VCC10 VCC11
XOUT
3.3V 100K RESET 0.1F D- DD+ D+ DD-[1] DD-[1] DD+[1] DD+[1] DD-[2] DD-[2] DD+[2] DD+[2] DD-[3] DD-[3] DD+[3] DD+[3] DD-[4] DD-[4] DD+[4] DD+[4] GND1 GND2 GND3 GND4 GND5 GND6 GND7 GND8 GND9 GND10 GND11 GND12
GREEN[1] GREEN[1] AMBER[1] AMBER[1] GREEN[2] GREEN[2] AMBER[2] AMBER[2] GREEN[3] GREEN[3] AMBER[3] AMBER[3]
150 F 10V
DD-[3] DD+[3] 0.01 F
VCC D- D+ GND SHELL 3.3 V
CY7C65640-QFN
GREEN[4] GREEN[4] AMBER[4] AMBER[4] PWR1 OVR1 PWR2 OVR2 PWR3 OVR3 PWR4 OVR4 SPI_CS PWR1 OVR1 PWR2 OVR2 PWR3 OVR3 PWR4 OVR4 SPI_CS
GREEN#[3] AMBER#[3]
680
680
PWR4 150 F 10V DD-[4] DD+[4] 0.01 F
VCC D- D+ GND SHELL 3.3 V
SPI_SCK SPI_SCK SPI_SD SPI_SD
GREEN#[4] AMBER#[4] 680
680
Figure 13-1. Sample Schematic
Document #: 38-08019 Rev. *C
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CY7C65640
14.0
14.1
Electrical Characteristics
Absolute Maximum Ratings
Storage Temperature ........................................................................................................................................ -65C to +150 C Ambient Temperature with Power Applied ................................................................................................................ 0C to +70C Supply Voltage to Ground Potential ...................................................................................................................... -0.5V to +4.0V DC Voltage Applied to Outputs in High Z State.............................................................................................. -0.5V to VCC + 0.5V Power Dissipation (4 HS ports)..............................................................................................................................................1.6W Static Discharge Voltage ....................................................................................................................................................>2000V Max. Output Sink Current per I/O ........................................................................................................................................10 mA
14.2
Operating Conditions
TA (Ambient Temperature Under Bias) ..................................................................................................................... 0C to +70C Supply Voltage ................................................................................................................................................... +3.15V to +3.45V Ground Voltage ..........................................................................................................................................................................0V FOSC (Oscillator or Crystal Frequency) ................................................. 24 MHz 0.05%, parallel resonant, fundamental mode
14.3
DC Electrical Characteristics
Description Supply Voltage Input High Voltage Input Low Voltage Input Leakage Current Output Voltage High Output Low Voltage Output Current High Output Current Low Input Pin Capacitance Suspend Current Supply Current 4 Active ports Full-Speed Host, Full-Speed Devices High-Speed Host, High-Speed Devices High-Speed Host, Full-Speed Devices 2 Active Ports Full-Speed Host, Full-Speed Devices High-Speed Host, High-Speed Devices High-Speed Host, Full-Speed Devices No Active Ports Full-Speed Host High-Speed Host 255 460 395 255 415 380 255 370 41 45 0.1 210 133 49 5 10 mA mA mA mA mA mA mA mA A A mV ns 100 0 < VIN < VCC IOUT = 4 mA IOUT = -4 mA 2.4 0.4 4 4 10 Conditions Min. 3.15 2 -0.5 Typ. 3.3 Max. 3.45 5.25 0.8 10 Unit V V V A V V mA mA pF A
Parameter VCC VIH VIL Il VOH VOL IOH IOL CIN ISUSP ICC
USB Transceiver ZHSDRV Ii IOZ VHSRS Trfi Driver Output Resistance Input Leakage Current Three-State Output OFF-State Current High Speed Receiver Sensitivity Level Full Speed Frame Jitter
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14.4 AC Electrical Characteristics
Both the upstream USB transceiver and all four downstream transceivers have passed the USB-IF USB 2.0 Electrical Certification Testing. 14.4.1 Serial Peripheral Interface Description Clock Rise/Fall Time Clock Frequency Data Set-up Time Hold Time 14.4.2 Eye Diagram 50 100 Conditions Min. Typ. Max. 500 250 Unit ns KHz ns ns
Parameter
Document #: 38-08019 Rev. *C
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CY7C65640
15.0 Ordering Information
Ordering Code CY7C65640-LFC CY4602 56-pin QFN TetraHub USB 2.0 4 port Hub Reference Design Kit Package Type
16.0
Package Diagrams
The TetraHub is available in a space-saving 56-pin QFN (8 X 8 mm) 56-Lead QFN (8 x 8 mm)
51-85144-*B
Note: The bottom metal pad size varies by product due to die size variable. If metal pad design or dimension are critical with your board designs, please contact Cypress Sales office to get the specific outline option.
Document #: 38-08019 Rev. *C
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CY7C65640
16.1 Quad Flat Package No Leads (QFN) Package Design Notes
The QFN (Quad Flatpack No Leads), being a lead free package, the electrical contact of the part to the Printed Circuit Board (PCB) is made by soldering the lands on the bottom surface of the package to the PCB. Hence special attention is required to the heat transfer area below the package to provide a good thermal bond to the circuit board. A Copper (Cu) fill should be designed into the PCB as a thermal pad under the package. Heat is transferred from the TeraHub through the device's metal paddle on the bottom side of the package. Heat from here is conducted to the PCB at the thermal pad. It is then conducted from the thermal pad to the PCB inner ground plane by a 5 x 5 array of Via. A Via is a plated through hole in the PCB with a finished diameter of 13mil. The QFN's metal die paddle must be soldered to the PCB's thermal pad. Solder mask is placed on the board top side over each Via to resist solder flow into the Via. The mask on the top side also minimizes outgassing during the solder reflow process. Please follow the layout guidelines provided in the PCB layout files accompanied with the CY4602 TetraHub Reference Design Kit. The information in this section was derived from the original application note by the package vendor. For further information on this package design please refer to the application note "Surface Mount Assembly of AMKOR's MicroLeadFrame (MLF) Technology". This application note can be downloaded from AMKOR's website from the following URL http://www.amkor.com/products/notes_papers/MLF_AppNote_0301.pdf. This application note provides detailed information on board mounting guidelines, soldering flow, rework process, etc. Figure 16-1 below displays a cross-sectional area underneath the package. The cross section is of only one via. The solder Paste template needs to be designed to allow at least 50% solder coverage. The thickness of the solder paste template should be 5mil. It is recommended that "No Clean", type 3 solder paste is used for mounting the part. Nitrogen purge is recommended during reflow.
0.017" dia Solder Mask Cu Fill Cu Fill
PCB Material
0.013" dia
PCB Material
Via hole for thermally connecting the QFN to the circuit board ground plane.
This figure only shows the top three layers of the circuit board: Top Solder, PCB Dielectric, and the Ground Plane.
Figure 16-1. Cross-section of the Area Underneath the QFN Package
Figure 16-2a is a plot of the solder mask pattern and Figure 0-1b displays an X-Ray image of the assembly (Darker areas indicate solder).
Figure 16-2a. Plot of the Solder Mask (White Area)
Figure 0-1b. X-Ray Image of the Assembly
TetraHub is a trademark of Cypress Semiconductor Corporation. All product and company names mentioned in this document may be the trademarks of their respective holders Document #: 38-08019 Rev. *C Page 24 of 25
(c) Cypress Semiconductor Corporation, 2002. The information contained herein is subject to change without notice. Cypress Semiconductor Corporation assumes no responsibility for the use of any circuitry other than circuitry embodied in a Cypress Semiconductor product. Nor does it convey or imply any license under patent or other rights. Cypress Semiconductor does not authorize its products for use as critical components in life-support systems where a malfunction or failure may reasonably be expected to result in significant injury to the user. The inclusion of Cypress Semiconductor products in life-support systems application implies that the manufacturer assumes all risk of such use and in doing so indemnifies Cypress Semiconductor against all charges.
CY7C65640
Document History Page
Document Title: CY7C65640 TetraHubTM High-speed USB Hub Controller Document Number: 38-08019 REV. ** *A ECN NO. 113506 116812 Issue Date 04/25/02 08/15/02 Orig. of Change BHA MON Description of Change New Data Sheet (preliminary) Supply voltage range changed from 3.3V-3.6V to 3.15V-3.45 Added EPROM types that can be used with HX2 (p. 14) Added description of bit 7 of Byte 12 (Illegal Hub Descriptor) D2 Load (p. 15) Added high speed sensitivity level of receiver (p. 20) Added QFN package design notes (section 16.1) Fixed the Spec field in the Default Device Descriptor section 7.1 Fixed Interface Protocol field of the interface descriptor, section 7.3 Fixed Device Protocol field of the interface descriptor, section 7.7 Modified table 9-2, section 9.2 Added table 9-4, 9-5, section 9.2 Added table 4-1, 4-2, section 4.8 Added information on bits in wHubCharacterestics, section 7.8 Modified figure 16-1 in QFN package design notes, section 16.1 Included the eye diagram, section 14.4.2 Preliminary to Final Fixed the SPI clock Frequency to 250 KHz, section 14.4.1 Added information on the configuration of unused port pins, section 6.0 Added statement that no special power-up procedure is required, section 6.0
*B
118518
10/31/02
MON
*C
121793
12/09/02
MON
Document #: 38-08019 Rev. *C
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