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STMPE2401 数据表(PDF) 44 Page - STMicroelectronics

部件名 STMPE2401
功能描述  24-bit Enhanced port expander with Keypad and PWM controller Xpander logic
PDF  55 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

STMPE2401 数据表(HTML) 44 Page - STMicroelectronics

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Keypad controller
STMPE2401
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13.6
KPC_ctrl_lsb register
13.7
Data registers
The KPC_DATA register contains three bytes of information. The first two bytes store the key
coordinates and status of any two keys from the normal key matrix, while the third byte store
the status of dedicated keys.
Table 42. KPC_ctrl_lsb register
Bit
7
654
3
2
1
0
Name
DB_0 ~ 5
SCAN
Read/Write
WW
W
WWW
W
W
Reset Value
0
000
0
0
0
0
Bit
Name
Description
7
DB_6
0-128ms of de-bounce time
6DB_5
5DB_4
4DB_3
3DB_2
2DB_1
1DB_0
0
SCAN
‘1’ to start scanning; ‘0’ to stop
Table 43. KPC_data_byte0 register
Bit
7
6
5
432
1
0
Name
Up/Down
R3
R2
R1R0C2
C1
C0
Read/Write
R
R
R
RRR
R
R
Reset Value
1
1
1
110
0
0
Bit
Name
Description
7
Up/Down
‘0’ for key-down, ‘1’ for key-up
6
R3
row number of key 1 (valid range : 0-11)
0x1111 for No Key
5R2
4R1
3R0
2
C2
column number of key 1 (valid range : 0-7)
1C1
0C0



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