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SM16312

VFD CONTROLLER/DRIVER

Samhop Mircroelectronics 

三合微科股份有限公司

SAMHOP Microelectronics Corp.

SM16312

VFD CONTROLLER

/DRIVER

PIN DESCRIPTION

Symbol

S1 to S4

Dout

Pin Name

Switch Input

Data Output

Pin No.

1 to 4

5

Function Description

4 bit general-purpose input port.

Outputs serial data at falling edge of shift

clock, starting from lower bit.

Din

GND

CLK

Data Input

Logic Ground

Clock Input

6

7, 43

8

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

Strobe

9

STB is high, CLK is ignored.

K1 to K4

Key data input

10 to 13

Data input to these pins is latched at end

of display cycle.

VDD

Logic Power

Sg1/KS1~Sg6/KS6 Segment/Key

Sg7~Sg11

Segment

Sg12/G11~Sg16/G7 Segment/Grid

14, 38 5V+10%.

Segment output pins (Dual function as

15 to 20 key source).

21 to 25 Segment output pins

26,28 to 31

These pins are selectable for segment or

grid output.

VEE

G1~G6

LED1~LED4

OSC

Pull Down Level

Grid

LED Output

Oscillator Pin

27

32 to 37

39 to 42

44

VDD-35V max.

Grid output pins

CMOS output. +20 mA max.

Connect resistor for determining

oscillation frequency to this pin.

Page 3

V.1.2, 8/8/01

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