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MSC1215-xx

¡ Semiconductor

• CH1-6

Analog voltage input pin for the A/D converter

• COL1-4

Key matrix input pins

These pins are active "Low" and pulled up to "H" through built-in resistors except when "L" is

input by a pushed down key.

• ROW1-3

Key matrix scanning output

Normally ROW1-3 output "L", by detecting the key switch to be pushed down or released, a

key scan starts, sending CS pulses two times and VF data, after above turning the CS pin to "L"

from "H". After scan stops, all the ROW outputs turn to "L".

• OSC0, 1

RC oscillation input pins

A resistor and a capacitor are connected to these pins. (See figure below)

OSC1

OSC0

R

C

• SEG1-17

Segment output pins

• GRID1, 2

Grid output pins

Output an inverted signal of a grid signal.

These pins are connected to inputs of external drivers (such as a PNP transistor).