Keypad Interface - Samsung S5PV210 Hardware Design Manual

S5PV210_HARDWARE DESING GUIDE REV 1.0

30. KEYPAD INTERFACE

In S5PV210, The Key Pad ports multiplexed with GPIO ports provide up to 14 row and 8 columns.
Keypad signals(Key_pad_ROW and Key_pad_COL) are multiplexed Host I/F and EINT. Therefore it is requisite to
set GPIO ports as keypad function.
Refer to GPH2,GPH3,GPJ4 registers.
Signal
KP_COL[7:0]
KP_ROW[13:0]
I/O Description
O KeyIF_Column_data[7:0]
I KeyIF_Row_data[13:0]
Figure 30-1) Multi-key input keypad example
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