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STMPE2403 Fiches technique(PDF) 51 Page - STMicroelectronics

No de pièce STMPE2403
Description  24-bit Enhanced port expander with Keypad and PWM controller Xpander logic
PDF  63 Pages
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Fabricant  STMICROELECTRONICS [STMicroelectronics]
Site Internet  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STMPE2403 Fiches technique(HTML) 51 Page - STMicroelectronics

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STMPE2403
Keypad controller
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12.7
KPC_ctrl_lsb register
12.8
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.
KPC_data_byte0 Register
Bit
7
654
3
2
1
0
Name
DB_0 ~ 5
SCAN
Read/Write
RW
RW
RW
RW
RW
RW
RW
RW
Reset Value
0
0
0
0
0
0
0
0
Table 50. Bit description
Bit
Name
Description
7DB_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
Bit
7
654321
0
Name
Up/Down
R3R2R1R0C2
C1
C0
Read/Write
R
RRRRRRR
Reset Value
1
111100
0
Table 51. Bit description
Bit
Name
Description
7
Up/Down
‘0’ for key-down, ‘1’ for key-up
6R3
row number of key 1 (valid range : 0-11)
0x1111 for No Key
5R2
4R1
3R0
2C2
column number of key 1 (valid range : 0-7)
1C1
0C0



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