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Only for training and service purposes
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4.4 Key sense trouble (KEYPAD)
Key Sense sequence of KF690 is :
Default condition ROW(0-3) is 2.7V
→
Press the key
→
Corresponding ROW(x) and COL(x) go to 0V
→
Scan pulse( Col => Row )
→
MSM sense what key pressed.
Z3X-BOX.COM
Содержание KF690
Страница 175: ...Note Z 3 X B O X C O M ...
Страница 176: ...Note Z 3 X B O X C O M ...