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RN-42/RN-42-N Data Sheet
www.rovingnetworks.com
DS-RN42-V1.0 2/17/2010
Class 2 Bluetooth(R) Module
Features
* * * * Fully qualified Bluetooth 2.1/2.0/1.2/1.1 module Bluetooth v2.0+EDR support Available with on board chip antenna (RN42) and without antenna (RN-42-N) Postage stamp sized form factor, 13.4mm x 25.8 mm x 2mm (RN-42) and 13.4mm x 20 mm x 2 mm (RN-42-N) Low power (26uA sleep, 3mA connected, 30mA transmit) UART (SPP or HCI) and USB (HCI only) data connection interfaces. Sustained SPP data rates - 240Kbps (slave), 300Kbps (master) HCI data rates - 1.5Mbps sustained, 3.0Mbps burst in HCI mode Embedded Bluetooth stack profiles included (requires no host stack): GAP, SDP, RFCOMM and L2CAP protocols, with SPP and DUN profile support. Bluetooth SIG certified Castellated SMT pads for easy and reliable PCB mounting Certifications: FCC, ICS, CE Environmentally friendly, RoHS compliant
Applications
* * * * * Cable replacement Barcode scanners Measurement and monitoring systems Industrial sensors and controls Medical devices Barcode readers Computer accessories
* * * * *
* *
Description
The RN42 is a small form factor, low power, highly economic Bluetooth radio for OEM's adding wireless capability to their products. The RN42 supports multiple interface protocols, is simple to design in and fully certified, making it a complete embedded Bluetooth solution. The RN 42 is functionally compatible with RN 41. With its high performance on chip antenna and support for Bluetooth(R) Enhanced Data Rate (EDR), the RN42 delivers up to 3 Mbps data rate for distances to 20M. The RN-42 also comes in a package with no antenna (RN-42-N). Useful when the application requires an external antenna, the RN-42-N is shorter in length and has RF pads to route the antenna signal.
* * * *
Block Diagram
Crystal
VCC GND PIO4 PIO5 PIO6 USB UART PCM
RF Switch PA BALUN
CSR BlueCore-04 External
Flash Memory
809 University Avenue * Los Gatos, CA 95032 * Tel (408) 395-6539 * info@RovingNetworks.com ~1~
RN-42/RN-42-N Data Sheet
www.rovingnetworks.com
DS-RN42-V3.1 2/17/2010
Overview
* * * * * * * * * Baud rate speeds: 1200bps up to 921Kbps, non-standard baud rates can be programmed. Class 2 radio, 60 feet (20meters) distance, 4dBm output transmitter, -80dBm typical receive sensitivity Frequency 2402 ~ 2480MHz, FHSS/GFSK modulation, 79 channels at 1MHz intervals Secure communications, 128 bit encryption Error correction for guaranteed packet delivery UART local and over-the-air RF configuration Auto-discovery/pairing requires no software configuration (instant cable replacement). Auto-connect master, IO pin (DTR) and character based trigger modes
Digital I/O Characteristics
2.7V VDD 3.0V Input logic level LOW Input logic level HIGH Output logc level LOW Output logic level HIGH All I/O's (except reset) default to weakpull down Min -0.4 0.7VDD VDD-0.2 +0.2 Typ. +1.0 Max. +0.8 VDD+0.4 0.2 +5.0 Unit V V V V uA
809 University Avenue * Los Gatos, CA 95032 * Tel (408) 395-6539 * info@RovingNetworks.com ~2~
RN-42/RN-42-N Data Sheet
www.rovingnetworks.com
DS-RN42-V3.1 2/17/2010
Environmental Conditions
Parameter Temperature Range (Operating) Temperature Range (Storage) Relative Humidity (Operating) Relative Humidity (Storage) Value o o -40 C ~ 85 C o o -40 C ~ 85 C 90% 90%
Electrical Characteristics
Parameter Supply Voltage (DC) Min 3.0 Typ. 3.3 2 20 3 26 Max. 3.6 Unit V mA mA mA uA
Average power consumption
Standby/Idle (default settings) Connected (normal mode) Connected (low power Sniff) Standby/Idle (Deep sleep enabled)
0
Radio Characteristics
Parameter Sensitivity @ 0.1%BER Freq. (GHz) 2.402 2.441 2.480 2.402 2.441 2.480 2.402 2.441 2.480 Min 0 0 0 140 140 140 140 140 140 Typ -80 -80 -80 2 2 2 5 5 5 900 15 13 165 165 165 190 190 190 Max -86 -86 -86 4 4 4 75 75 75 1000 175 175 175 Bluetooth Specification -70 Units dBm dBm dBm dBm dBm dBm kHz kHz kHz kHz kHz kHz kHz kHz kHz kHz kHz kHz
RF Transmit Power Initial Carrier Frequency Tolerance 20dB bandwidth for modulated carrier Drift (Five slots packet) Drift Rate f1avg Max Modulation
4
75 1000 40 20 >140
f2avg Min Modulation
2.402 2.441 2.480 2.402 2.441 2.480
115
Range Characteristics (Approximate range in office environment)
Range After One Wall After Two Walls After Three Walls RN-42 55 feet 60 feet 36 feet RN-41 150 feet 130 feet 60 feet
The above readings are approximate and may vary depending upon the RF environment. Bluetooth hops in a pseudo-random fashion over the 79 frequencies in the ISM band to adapt to the interference. Data throughput and range vary depending on the RF interference environment.
809 University Avenue * Los Gatos, CA 95032 * Tel (408) 395-6539 * info@RovingNetworks.com ~3~
RN-42/RN-42-N Data Sheet
www.rovingnetworks.com
DS-RN42-V3.1 2/17/2010
Pin Description
RF PAD GND
GND SPI MOSI PIO6 PIO7 RESET SPI_CLOCK PCM_CLK PCM_SYNC PCM_IN PCM_OUT VDD GND
1 2 3 4
24 23 22 21 20
SPI_MOSI SPI_CSB PIO4 PIO5 PIO3 PIO2 USB_DUSB_D+ UART_CTS UART_RST UART_TX UART_RX
GND SPI MOSI PIO6 PIO7 RESET SPI_CLOCK PCM_CLK PCM_SYNC PCM_IN PCM_OUT VDD GND 1 2 3 4
GND
27 26 25
24 23 22 21
SPI_MOSI SPI_CSB PIO4 PIO5 PIO3 PIO2 USB_DUSB_D+ UART_CTS UART_RST UART_TX UART_RX
RN-42-N
RN-42
5 6 7 8 9 10 11 12
5 6 7 8 9 10 11 12
PIO10
20 19 18 17 16 15 14 13
19 18 17 16 15 14 13
35 29 34 33 32 31 28 30
PIO10 PIO11 PIO9 PIO8 AIO0 GND GND
AIO1
35 29 34 33 32 31 28 30
PIO11 PIO9 PIO8 AIO0 GND GND
AIO1
Pin
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 30 31 32 33 34 35
Name
GND SPI MOSI PIO6 PIO7 RESET SPI_CLK PCM_CLK PCM_SYNC PCM_IN PCM_OUT VDD GND UART_RX UART_TX UART_RTS UART_CTS USB_D+ USB_DPIO2 PIO3 PIO5 PIO4 SPI_CSB SPI_MISO GND RF Pad GND AIO0 PIO8 PIO9 PIO10 PIO11 AIO1
Description
Programming only Set BT master (HIGH=auto-master mode) Set Baud rate (HIGH = force 9600, LOW = 115K or firmware setting) Active LOW reset Programming only PCM interface PCM interface PCM interface PCM interface 3.3V regulated power input UART receive Input UART transmit output UART RTS, goes HIGH to disable host transmitter UART CTS, if set HIGH, disables transmitter USB port USB port Status, HIGH when connected, LOW otherwise Auto discovery = HIGH Status, toggles based on state, LOW on connect Set factory defaults Programming only Programming only GND for RN42-N RF Pad for RN42-N GND for RN42-N Optional analog input Status (RF data rx/tx) IO IO (remote DTR signal) IO (remote RTS signal ) Optional analog input
Default
No Connect Input to RN42with weak pulldown Input to RN42 with weak pulldown Input to RN42 with 1K pullup No Connect No Connect No Connect No Connect No Connect
Voltage
0V 3V 0V-3.3V 0V-3.3V
Input to RN42 High level output from RN42 Low level output from RN42 Low level input to RN42 Pull up 1.5K when active Output from RN42 Input to RN42 with weak pulldown Output from RN42 Input to RN42 with weak pulldown No Connect No Connect
0V-3.3V 0V-3.3V 0V-3.3V 0V-3.3V 0V-3.3V 0V-3.3V 0V-3.3V 0V-3.3V 0V-3.3V 0V-3.3V
Not Used Output from RN42 Input to RN42 with weak pulldown Input to RN42 with weak pulldown Input to RN42 with weak pulldown Not Used
0V-3.3V 0V-3.3V 0V-3.3V 0V-3.3V
809 University Avenue * Los Gatos, CA 95032 * Tel (408) 395-6539 * info@RovingNetworks.com ~4~
RN-42/RN-42-N Data Sheet
www.rovingnetworks.com
DS-RN42-V3.1 2/17/2010
Typical Application Circuit
Since the RN 41 and RN 42 are functionally compatible, this application diagram applies to RN 41 and RN 42.
809 University Avenue * Los Gatos, CA 95032 * Tel (408) 395-6539 * info@RovingNetworks.com ~5~
RN-42/RN-42-N Data Sheet
www.rovingnetworks.com
DS-RN42-V3.1 2/17/2010
RN-42 Module Dimensions
PCB LAYOUT PAD SIZE = 0.8 X 1.30 mm (TOP VIEW)
MODULE DIMENSIONS
13.4 mm
5.8 mm
3.3 mm 1 2 3 4 5 6 13.2 mm 7 8 9 10 11 12 2.8 mm 35 34 32 28 29 33 31 30 2.5 mm 3.5 mm
2.0 mm RF Shield
RN-42 RN41
1.2 mm
24 23 22 21 20 19 18 17 16 15 14 13
15.4 mm
RN41 RN-42 RN41
25.8 mm
Antenna
4.8 mm
25.8 mm
6.0 mm 7.2 mm 8.4 mm 9.7 mm 10.7 mm 13.2 mm
809 University Avenue * Los Gatos, CA 95032 * Tel (408) 395-6539 * info@RovingNetworks.com ~6~
RN-42/RN-42-N Data Sheet
www.rovingnetworks.com
DS-RN42-V3.1 2/17/2010
RN-42-N Module Dimensions
PCB LAYOUT PAD SIZE = 0.8 X 1.30 mm (TOP VIEW) MODULE DIMENSIONS
3.2 mm 2.0 mm 27 2625 1 2 3 4 5 6 13.4 mm 7 8 9 10 11 12 2.8 mm 35 34 32 28 29 33 31 30 2.5 mm 3.5 mm 4.8 mm 6.0 mm 7.2 mm 8.4 mm 9.7 mm 10.7 mm 13.2 mm
25.8 mm 2.0 mm RF Shield
3.8 mm
RN 42-N
1.2 mm
24 23 22 21 20 17.2 mm 19 18 17 16 15 14 13
13.4 mm
20.0 mm
RN 42 N RN41
809 University Avenue * Los Gatos, CA 95032 * Tel (408) 395-6539 * info@RovingNetworks.com ~7~
RN-42/RN-42-N Data Sheet
www.rovingnetworks.com
DS-RN42-V3.1 2/17/2010
Design Concerns
1. Reset circuit. RN-42 contains a weak pullup to VCC, the polarity of reset on the RN42 is ACTIVE LOW. A power on reset circuit with delay is OPTIONAL on the reset pin of the module. It should only be required if the input power supply has a very slow ramp, or tends to bounce or have instability on power up. Often a microcontroller or embedded CPU IO is available to generate reset once power is stable. If not, there are many low cost power supervisor chips available, such as MCP809, MCP102/121, and Torex XC61F. 2. Factory reset PIO4. It is a good idea to connect this pin to a switch, or jumper, or resistor, so it can be accessed. This pin can be used to reset the module to FACTORY DEFAULTS and is often critical in situations where the module has been mis-configured. To set Factory defaults start HIGH, then toggle two times. 3. Connection status. PIO5 is available to drive an LED, and blinks at various speeds to indicate status. PIO2 is an output which directly reflects the connection state, it goes HIGH when connected, and LOW otherwise. 4. HCI mode. The RN42 module must be loaded with special firmware to run in HCI mode. When in HCI mode the standard SPP/DUN applications are disabled. 5. Using SPI bus for flash upgrade. While not required, this bus is very useful for configuring advanced parameters of the Bluetooth modules, and is required for upgrading the firmware on modules. The suggested ref-design shows a 6pin header which can be implemented to gain access to this bus. A minimum-mode version could just use the SPI signals (4pins) and pickup ground and VCC from elsewhere on the design. 6. Minimizing Radio interference. When laying out the carrier board for the RN42 module the areas under the antenna and shielding connections should not have surface traces, GND planes, or exposed vias. (See diagram to right) For optimal radio performance the antenna end of RN42 module should protrude 5mm past any metal enclosure.
1.5 mm 13.2 mm 1.5 mm
7.0 mm 2.0 mm
ATTENTION: Do not locate any par ts, sur face tr aces, inter nal tr aces or GND plane under the antenna ar ea
1.5 mm
1 2 3 4 5 6 7 8 9 10 11 12
ATTENTION: Do not locate vias or sur face tr aces under shield connector s 1.5m m squar e
24 23 22 21 20 19 18 17 16 15 14 13
25.8 mm
35 34 32 28 29 33 31 30 1.5 mm
809 University Avenue * Los Gatos, CA 95032 * Tel (408) 395-6539 * info@RovingNetworks.com ~8~
RN-42/RN-42-N Data Sheet
www.rovingnetworks.com
7. Antenna Design. The pattern from the rf_out terminal pad should be designed with 50ohms impedance and traced with straight lines. (see diagram to the right) The rf_out signal line should not run under of near the RN21 module. The GND plane should be on the side of the PCB which the module is mounted. The GND should be reinforced with through-hole connections and other means to stabilize the electric potential. DS-RN42-V3.1 2/17/2010
GND RF_OUT GND
RN21 Module
8. Soldering Reflow Profile. * Lead-Free Solder Reflow * Temp: 230 degree C, 30-40 seconds, Peak 250 degree C maximum. * Preheat temp: 165 +- 15 degree C, 90 to 120 seconds. * Time: Single Pass, One Time
Compliance Information
Category Country USA FCC ID: EUROPE Radio CANADA IC Canada ID: USA EUROPE EMC Standard FCC CFR47 Part 15 C, para 15.247 T9J-RN42 EN 300 328-1 EN 300 328-2 2.4GHz IC RSS-210 low power comm. device 6514A-RN42 FCC CFR47 Part 15 subclass B EN 55022 Class B radiated EN61000-4-2 ESD immunity EN61000-4-3 radiated field EN61000-4-6 RF immunity EN61000-4-8 power magnetic immunity B014867 RoHS compliant
Bluetooth Environmental
LISTED RoHS
Ordering Information
Part Number RN-42 RN-42-H RN-42-U RN-42-N Description Standard Application firmware (SPP/DUN Master and Slave) HCI firmware (HCI over H4 UART) USB firmware (HCI over USB port, slave device at 12Mbps rate) No Antenna, Standard Application firmware (SPP/DUN Master and Slave)
For other configurations, contact Roving Networks directly. Visit http://www.rovingnetworks.com/buynow.php for current pricing and a list of distributors carrying our products.
809 University Avenue * Los Gatos, CA 95032 * Tel (408) 395-6539 * info@RovingNetworks.com ~9~
RN-42/RN-42-N Data Sheet
www.rovingnetworks.com
DS-RN42-V3.1 2/17/2010 Copyright (c) 2010 Roving Networks. All rights reserved. The Bluetooth trademark and logo are registered trademarks and are owned by the Bluetooth SIG, Inc. All other trademarks are property of their respective owners. Roving Networks reserves the right to make corrections, modifications, and other changes to its products, documentation and services at any time. Customers should obtain the latest relevant information before placing orders and should verify that such information is current and complete. Roving Networks assumes no liability for applications assistance or customer product design. Customers are responsible for their products and applications using Roving Networks components. To minimize the risks associated with customer products and applications, customers should provide adequate design and operating safeguards. Roving Networks products are not authorized for use in safety-critical applications (such as life support) where a failure of the Roving Networks product would reasonably be expected to cause severe personal injury or death, unless officers of the parties have executed an agreement specifically governing such use.
809 University Avenue * Los Gatos, CA 95032 * Tel (408) 395-6539 * info@RovingNetworks.com ~ 10 ~

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