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¡ Semiconductor

MSC1218

PIN DESCRIPTIONS

Symbol

Type

Decription

SEG1 - 21

O

Output pins for segment signals for driving VF display tube (anode).

GRID1 - 3

O

Output pins for grid signals for driving VF display tube (grid).

I

D-IN

CLOCK

OSC1

CS

Serial data input pin (positive logic).

Shift clock input pin.

Serial data shifts at the rising edge of CLOCK.

RC oscillator connecting pins. Oscillation frequency is 3.2MHz.

Connect a resistor between the OSC1 and OSC0 pins and a capacitor between

the OSC0 pin and the ground.

Chip select input pin. Data transfer is inhibited when this pin is "H".

Power supply pins. When using these pins, connect each of them to the power

supply.

Ground pin.

I

I

I

—

OSC0

Pin

32,

1 - 20

29 - 31

24

23

27

22

26

21

28

25

—

O

GND