參數(shù)資料
型號: AK4184VG
廠商: Asahi Kasei Microsystems Co.,Ltd
英文描述: TSC with Keypad Scanner and GPIO Expander
中文描述: 臺糖與鍵盤掃描儀和GPIO擴展
文件頁數(shù): 24/36頁
文件大?。?/td> 597K
代理商: AK4184VG
[AK4184]
MS0603-E-00
2007/04
24
Keypad Column Mask Register (PAGE 1)
The Keypad Column Mask Register format is shown in Table 19. This register allows a certain column to be masked
from keypad detection.
Addr
NAME
D15
D14
D13
D12
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
03H
KPColumnMASK
0
0
0
0
0
0
0
0
0
0
CM6
CM5
CM4
CM3
CM2
CM1
Table 18. Keypad Column Mask Register Format
Description
Enable key press detection for a certain column pin (default)
Disable key press detection for a certain column pin
Table 19. Keypad Column Mask bit
CMx
0
1
Keypad Scan Initiate Command (PAGE 1)
When a key is pressed with the KST0 bit = “1”, AK4184 does not start the debounce and key scan, the Host
Controller sends a keypad scan initiate command to the AK4184. After receiving the command, the AK4184 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
NAME
D15 D14 D13 D12
D11
04H
KPScanInitiate
X
X
X
X
X
Table 20. Keypad Scan Initiate Command Format
D10
D9
D8
D7
D6
D5
D4 D3 D2 D1
D0
X
X
X
X
X
X
X
X
X
X
X
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