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| SM16312 SAMHOP Microelectronics Corp. VFD CONTROLLER /DRIVER GENERAL DESCRIPTION SM16312 is a Vacuum Fluorescent Display (VFD) Controller driven on a 1/8 to 1/16 duty factor. Eleven segment output lines, 6 grid output lines, 5 segment/grid output drive lines, key scan, one display memory, IC control circuit are all incorporated in a single chip. It is pin to pin compatible with uPD16312(NEC). This SM16312 is ideal as a peripheral device of a single chip microcomputer. FEATURES * Multiple Display Modes * High Voltage Output * Key Scanning * General Purpose Input Ports (4 bit) * Dimming Circuitry (8 segment) * LED Display Ports(4 outs, 20mA max) * No external Resistors Needed for Driver Outputs * Serial Interface for controller APPLICATIONS * Audio System * Car Stereo * VCD * DVD * VCR * TV G4 G3 G2 G1 VDD LED4 LED3 LED2 LED1 GND OSC 34 35 36 37 38 39 40 41 42 43 44 PIN ASSIGNMENT G5 G6 Sg16/G7 Sg15/G8 Sg14/G9 Sg13/G10 VEE Sg12/G11 Sg11 Sg10 Sg9 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 Sg8 Sg7 Sg6/KS6 Sg5/KS5 Sg4/KS4 Sg3/KS3 Sg2/KS2 Sg1/KS1 VDD K4 K3 31 32 33 34 35 36 37 38 39 10 11 S1 S2 S3 S4 DOUT DIN GND CLK STB K1 K2 Page 1 V.1.2, 8/8/01 SM16312 SAMHOP Microelectronics Corp. VFD CONTROLLER /DRIVER BLOCK DIAGRAM Encoder DIN DOUT CLK STB VDD R OSC Timing Gen Serial Data I/F Dimming Ckt Segment Driver SG1 11 16 SG11 Display Memory 16bits*11words 16 bit 5 Latch Data Selector SG12/ Grid11 SG16/ Grid7 ~ Grid1 6 5 Seg/Grid Driver 5 K1 4 4 ~ K4 S1 ~ S4 4bit Latch Key Memory (4*6) Grid6 4bit Latch Power Ckt LED1 ~ LED4 VDD GND VEE (+5V) (0V) (-30V) Page 2 V.1.2, 8/8/01 ~ 11 bit Shift Register 11 Grid Driver ~ SM16312 SAMHOP Microelectronics Corp. VFD CONTROLLER /DRIVER PIN DESCRIPTION Symbol S1 to S4 Dout Din GND CLK STB K1 to K4 VDD Sg1/KS1~Sg6/KS6 Pin Name Switch Input Data Output Data Input Logic Ground Clock Input Strobe Key data input Logic Power Segment/Key Segment Segment/Grid Pull Down Level Grid LED Output Oscillator Pin Pin No. 1 to 4 5 6 7, 43 8 9 10 to 13 14, 38 15 to 20 21 to 25 26,28 to 31 27 32 to 37 39 to 42 44 Function Description 4 bit general-purpose input port. Outputs serial data at falling edge of shift clock, starting from lower bit. Input serial data at rising edge of shift clock, starting from lower bit. Connect this pin to GND of system. Reads serial data at rising edge, and outputs data at falling edge. While STB is low, Data is valid; while STB is high, CLK is ignored. Data input to these pins is latched at end of display cycle. 5V+10%. Segment output pins (Dual function as key source). Segment output pins These pins are selectable for segment or grid output. VDD-35V max. Grid output pins CMOS output. +20 mA max. Connect resistor for determining oscillation frequency to this pin. Sg7~Sg11 Sg12/G11~Sg16/G7 VEE G1~G6 LED1~LED4 OSC Page 3 V.1.2, 8/8/01 SM16312 SAMHOP Microelectronics Corp. VFD CONTROLLER /DRIVER ABSOLUTE MAXIMUM RATINGS (Ta=25oC, GND=0V) Parameter Logic Supply Voltage Driver Supply Voltage Logic Input Voltage VFD Driver Output Voltage LED Driver Output Current VFD Driver Output Current Symbol VDD VEE VI VO IOLED IOVFD Rating -0.5 to +7 VDD+0.5 to VDD-40 -0.5 to VDD+0.5 VEE-0.5 to VDD+0.5 +25 -40(grid) / -15(segment) Unit V V V V mA mA RECOMMENDED OPERATING CONDITIONS (Ta=-20 to +70oC, GND=0V) Parameter Logic Supply Voltage High-Level Input Voltage Low-Level Input Voltage Driver Supply Voltage Symbol VDD VIH VIL VEE Min. 4.5 0.7 VDD 0 0 Typ. 5 w w w Max. 5.5 VDD 0.3 VDD VDD-35 Unit V V V V Page 4 V.1.2, 8/8/01 SM16312 SAMHOP Microelectronics Corp. VFD CONTROLLER /DRIVER DC/AC ELECTRICAL CHARACTERISTIC (VDD=5V, GND=0V, VEE=VDD-35V, TA=25oC, unless otherwise noted) Parameter High-Level Output Voltage Low-Level Output Voltage Low-Level Output Voltage High-Level Output Current High-Level Output Current High-Level Input Voltage Low-Level Inut Voltage Oscillation Frequency Symbol VOHLED VOLLED VOLDout IOHSg VOHGr VIH VIL fosc Test Condition IOHLED=-1mA LED1 to LED4 IOLLED=+20mA LED1 TO LED4 Dout, IOLDout=4mA Vo=VDD-2V Sg1 to Sg11 Vo=VDD-2V G1 to G6 Sg12/G11 to Sg16/G7 w w R=68K[ 0.7VDD w 350 w w 350 w 0.3VDD Min. 0.9VDD w w -3 -15 Typ. w Max. w Unit V w w w w 1 0.4 w w V V mA mA V V KHz 650 Page 5 V.1.2, 8/8/01 SM16312 SAMHOP Microelectronics Corp. VFD CONTROLLER /DRIVER PACKAGE SPEC. 44 PINS TQFP DIMENSION 12.0 + 0.2 10.0 33 23 34 22 Index 44 12 1 0.80 11 1.4 + 0.05 - 0.35 + 0.1 1.00 0.45 + 0.30 - Note: Controlling dimensions are in millimeters (MM). Page 6 1.6 12.0 + 0.2 10.0 V.1.2, 8/8/01 SM16312 SAMHOP Microelectronics Corp. VFD CONTROLLER /DRIVER PACKAGE SPEC. 44 PINS QFP DIMENSION 13.2 + 0.2 10.0 + 0.1 33 23 34 22 Index 44 12 1 0.80 11 2.0+ 0.2 - 10.0 + 0.1 0.3 1.60 0.88 + 0.05 - Note: Controlling dimensions are in millimeters (MM). Page 7 2.7 13.2 + 0.2 V.1.2, 8/8/01 |
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