Allwinner A20 - Keypad Interface Register List; Keypad Interface Register Description

A20 User Manual (Revision 1.2) Copyright © 2013 Allwinner Technology Co., Ltd. All Rights Reserved. Page 803 / 812
6.17.2. Keypad Interface Register List
Module Name
Base Address
KP
0x01C23000
Register Name
Offset
Description
KP_CTL
0x00
Keypad Control Register
KP_TIMING
0x04
Keypad Timing Parameter Register
KP_INT_CFG
0x08
Keypad Interrupt Configure Register
KP_INT_STA
0x0C
Keypad Interrupt Status Register
KP_IN0
0x10
Keypad Row Input Data Register 0
KP_IN1
0x14
Keypad Row Input Data Register 1
6.17.3. Keypad Interface Register Description
6.17.3.1. KEYPAD CONTROL REGISTER
Offset: 0x00
Register Name: KP_CTL
Default Value: 0x0000_0000
Bit
Read/Write
Default
Description
31:24
/
/
/
23:16
R/W
0
ROW_INPUT_MSK
Keypad Row Input Mask
When set to ‘1’, the corresponding input is masked.
15:8
R/W
0
Keypad Column Output Mask
When set to ‘1’, the corresponding output is masked.
7:1
/
/
/
0
R/W
0
IF_ENB
Keypad Interface enable