MSC1215 Datasheet, PDF (13/22 Pages) OKI electronic componets – 17 x 2 Duplex Driver with Dimming, Keyscan and A/D Converter Function

¡ Semiconductor
MSC1215-xx
• 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
R
OSC0
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).
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