三合微科股份有限公司 SM16312 SAMHOP Microelectronics Corp. VFD CONTROLLER /DRIVER GENERAL DESCRIPTION FEATURES 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. * 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 PIN ASSIGNMENT G5 G6 Sg16/G7 Sg15/G8 Sg14/G9 Sg13/G10 VEE Sg12/G11 Sg11 Sg10 Sg9 APPLICATIONS * Audio System * Car Stereo * VCD * DVD * VCR * TV 33 32 31 30 29 28 27 26 25 24 23 34 22 35 21 36 20 37 19 38 18 39 17 40 16 41 15 42 14 43 13 44 12 Sg8 Sg7 Sg6/KS6 Sg5/KS5 Sg4/KS4 Sg3/KS3 Sg2/KS2 Sg1/KS1 VDD K4 K3 Page 1 DOUT DIN GND CLK STB K1 K2 31 32 33 34 35 36 37 38 39 10 11 S1 S2 S3 S4 G4 G3 G2 G1 VDD LED4 LED3 LED2 LED1 GND OSC V.1.2, 8/8/01 三合微科股份有限公司 SM16312 SAMHOP Microelectronics Corp. VFD CONTROLLER /DRIVER BLOCK DIAGRAM Dimming Ckt SG1 DIN Serial Data I/F DOUT CLK STB 16 Display Memory 16bits*11words 11 16 bit 5 Latch Segment Driver ~ Encoder SG11 Data Selector VDD OSC Timing Gen Seg/Grid Driver 5 Key Memory (4*6) K1 ~ 4 11 bit Shift Register 11 ~ S4 SG16/ Grid7 Grid1 6 K4 S1 SG12/ Grid11 ~ 5 Grid Driver ~ R Grid6 4 4bit Latch 4bit Latch Power Ckt VDD GND VEE (+5V) (0V) (-30V) LED1 ~ LED4 Page 2 V.1.2, 8/8/01 三合微科股份有限公司 SM16312 SAMHOP Microelectronics Corp. VFD CONTROLLER /DRIVER PIN DESCRIPTION Function Description Symbol Pin Name Pin No. S1 to S4 Switch Input 1 to 4 Dout Data Output 5 Outputs serial data at falling edge of shift clock, starting from lower bit. Din Data Input 6 Input serial data at rising edge of shift clock, starting from lower bit. GND Logic Ground 7, 43 CLK Clock Input 8 Reads serial data at rising edge, and outputs data at falling edge. STB Strobe 9 While STB is low, Data is valid; while STB is high, CLK is ignored. K1 to K4 Key data input 10 to 13 VDD Logic Power 14, 38 Sg1/KS1~Sg6/KS6 Segment/Key 15 to 20 Segment output pins (Dual function as key source). Sg7~Sg11 Segment 21 to 25 Segment output pins Sg12/G11~Sg16/G7 Segment/Grid 26,28 to 31 VEE Pull Down Level 27 VDD-35V max. G1~G6 Grid 32 to 37 Grid output pins LED1~LED4 LED Output 39 to 42 OSC Oscillator Pin 44 CMOS output. +20 mA max. Connect resistor for determining oscillation frequency to this pin. Page 3 4 bit general-purpose input port. Connect this pin to GND of system. Data input to these pins is latched at end of display cycle. 5V+10%. These pins are selectable for segment or grid output. V.1.2, 8/8/01 三合微科股份有限公司 SM16312 SAMHOP Microelectronics Corp. VFD CONTROLLER /DRIVER ABSOLUTE MAXIMUM RATINGS (Ta=25oC, GND=0V) Parameter Symbol Rating Unit Logic Supply Voltage VDD -0.5 to +7 V Driver Supply Voltage VEE VDD+0.5 to VDD-40 V Logic Input Voltage VI -0.5 to VDD+0.5 V VFD Driver Output Voltage VO VEE-0.5 to VDD+0.5 V LED Driver Output Current IOLED +25 mA VFD Driver Output Current IOVFD -40(grid) / -15(segment) mA RECOMMENDED OPERATING CONDITIONS (Ta=-20 to +70oC, GND=0V) Parameter Symbol Min. Typ. Max. Unit Logic Supply Voltage VDD 4.5 5 5.5 V High-Level Input Voltage VIH 0.7 VDD ─ VDD V Low-Level Input Voltage VIL 0 ─ 0.3 VDD V Driver Supply Voltage VEE 0 ─ VDD-35 V Page 4 V.1.2, 8/8/01 三合微科股份有限公司 SM16312 SAMHOP Microelectronics Corp. VFD CONTROLLER /DRIVER DC/AC ELECTRICAL CHARACTERISTIC (VDD=5V, GND=0V, VEE=VDD-35V, TA=25oC, unless otherwise noted) Parameter Symbol High-Level Output Voltage VOHLED Low-Level Output Voltage VOLLED Test Condition Min. Typ. Max. Unit 0.9VDD ─ ─ V ─ ─ 1 V ─ ─ 0.4 V -3 ─ ─ mA -15 ─ ─ mA IOHLED=-1mA LED1 to LED4 IOLLED=+20mA LED1 TO LED4 Low-Level Output Voltage VOLDout Dout, IOLDout=4mA Vo=VDD-2V High-Level Output Current IOHSg High-Level Output Current VOHGr Sg1 to Sg11 Vo=VDD-2V G1 to G6 Sg12/G11 to Sg16/G7 High-Level Input Voltage VIH ─ 0.7VDD ─ ─ V Low-Level Inut Voltage VIL ─ ─ ─ 0.3VDD V Oscillation Frequency fosc R=68KΩ 350 350 650 KHz Page 5 V.1.2, 8/8/01 三合微科股份有限公司 SM16312 SAMHOP Microelectronics Corp. VFD CONTROLLER /DRIVER PACKAGE SPEC. 44 PINS TQFP DIMENSION 12.0 + 0.2 10.0 23 33 12.0 + 0.2 22 10.0 34 Index 12 44 1 11 1.6 1.4 + - 0.05 0.80 0.45 + - 0.30 0.35 + - 0.1 1.00 Note: Controlling dimensions are in millimeters (MM). Page 6 V.1.2, 8/8/01 三合微科股份有限公司 SM16312 SAMHOP Microelectronics Corp. VFD CONTROLLER /DRIVER PACKAGE SPEC. 44 PINS QFP DIMENSION 13.2 + 0.2 10.0 + 0.1 23 33 13.2 + 0.2 22 10.0 + 0.1 34 Index 12 44 1 11 2.7 2.0+ - 0.2 0.80 0.88 + - 0.05 0.3 1.60 Note: Controlling dimensions are in millimeters (MM). Page 7 V.1.2, 8/8/01