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AD7312 Datasheet(PDF) 3 Page - List of Unclassifed Manufacturers |
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3 / 12 page AD7312 1/4 to 1/11 Duty VFD Controller/Driver & Standby Master/Slave (Preliminary) Anachip Corp. www.anachip.com.tw Rev. A2 Dec 29, 2003 3/12 Pin Descriptions Symbol Name No. Description DIN Data input 6 Input serial data at rising edge of shift clock, starting from the low order bit. DOUT Data output 5 Output serial data at the falling edge of the shift clock, starting from low order bit. This is N-ch open-drain output pin. STB Strobe 9 Initializes serial interface at the rising or falling edge of the AD7312. It then waits for reception of a command. Data input after STB falling is processed as a command. While command data is processed, current processing is stopped, and the serial interface is initialized. While STB is high, CLK is ignored. CLK Clock input 8 Reads serial data at the rising edge, and outputs data at the falling edge. OSC Oscillator pin 44 Connect resistor in between this pin and Vdd to set up the oscillation frequency. Seg7 to Seg11 High-voltage output (Segment) 21 to 25 Segment output pins Seg1/KS1 to Seg6/KS6 High-voltage output 15 to 20 Multi-function pins, Segment output pins (Dual function as key scan source) Grid1 to Grid6 High-voltage output (Grid) 32 to 37 Grid output pins Seg12/Grid11 to Seg16/Grid7 High-voltage output (Segment/grid) 26, 28 to 31 These pins are selectable for segment or grid driving. LED1 and LED4 LED output 39 and 42 CMOS output RMBUF Remote Control Buffer 40 CMOS output PSV Power Saving Output 41 CMOS output KEY1 to KEY4 Key data input 10 to 13 Data input to these pins is latched at the end of the display cycle. VDD Logic power 14, 38 Logic power supply VSS Logic ground 7, 43 Connect this pin to system GND. VEE Pull-down level 27 Driver power supply SW1 and SW4 Switch input 1 and 4 These pins constitute a 2-bit general-purpose input port. RMIN Remote Control Input 2 Input pin SKEY Standby Key Input 3 Input pin |
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