ak4184a AKM Semiconductor, Inc., ak4184a Datasheet - Page 24

• Manufacturer Part Number: ak4184a
• Description: Tsc With Keypad Scanner And Gpio Expander
• Manufacturer: AKM Semiconductor, Inc.

■ Keypad Column Mask Register (PAGE 1)
The Keypad Column Mask Register format is shown in
from keypad detection.
Addr
■ Keypad Scan Initiate Command (PAGE 1)
When a key is pressed with the KST0 bit = “1”, the AK4184A does not start debounce and key scan, the Host
Controller sends a keypad scan initiate command to the AK4184A. After receiving the command, the AK4184A starts
a debounce scan, and the Host Controller can then read the data [D15:D0] from the keypad data register (KPDATA1,
KPDATA2). When receiving the command the Keypad Data Resister (KPDATA1, KPDATA2) is reset to 0000H.
Addr
MS0947-E-00
03H
04H
CMx
0
1
KPColumnMASK
KPScanInitiate
NAME
Enable key press detection for a certain column pin (default)
Disable key press detection for a certain column pin
NAME
D15
D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
0
X
D14
0
X
Table 20. Keypad Scan Initiate Command Format
Table 18. Keypad Column Mask Register Format
D13
0
X
Table 19. Keypad Column Mask bit
D12
0
X
D11
0
Description
X
D10
Table
0
- 24 -
X
D9
0
19. This register allows a certain column to be masked
D8
X
0
D7
0
X
D6
0
X
CM6
D5
X
CM5
D4
X
X
CM4
D3
X
CM3
D2
X
[AK4184A]
CM2
2008/04
D1
X
CM1
D0
X