参数资料
型号: ML9204-XXGA
厂商: LAPIS SEMICONDUCTOR CO LTD
元件分类: 显示控制器
英文描述: 24 X 35 DOTS FLUORESCENT DSPL CTRL, PQFP128
封装: 14 X 20 MM, 0.50 MM PITCH, PLASTIC, QFP-128
文件页数: 28/42页
文件大小: 317K
代理商: ML9204-XXGA
PEDL9204-02
OKI Semiconductor
ML9204-xx
33/41
Keyscan
Keyscanning is started only when depression or release of any key is detected in order to minimize noise caused
by scanning signal.
Then, keyscanning is continued until the keyscan stop mode is sent from a microcomputer.
The INT pin goes to the high level at the completion of 1-cycle scanning after the keyscan start, so the (high
level) signal sent from the INT pin can be used as an interrupt signal.
[Keyscan Timing and Cycles]
Depress/Release
keyscan stop
1 keyscan cycle
ROW1
ROW2
ROW3
ROW4
ROW5
INT
Keyscanning cannot be stopped by selecting the keyscan stop mode only once if:
- keyscanning is started after depression or release of any key is detected, and then
- a key is depressed or released again before the keyscan stop mode is selected.
To stop keyscanning, it is required to select the keyscan stop mode once again.
KS
Depress
Release
Keyscan
Depress
Keyscan
INT
CS
KS: Keyscan stop mode
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