STMPE2401TBR STMicroelectronics, STMPE2401TBR Datasheet - Page 44

• Manufacturer Part Number: STMPE2401TBR
• Description: IC I/O EXPANDER I2C 24B 36TFBGA
• Manufacturer: STMicroelectronics

Specifications of STMPE2401TBR

• Interface: I²C
• Number Of I /o: 24
• Interrupt Output: Yes
• Frequency - Clock: 400kHz
• Voltage - Supply: 1.65 V ~ 1.95 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 36-TFBGA
• Includes: Keypad, POR, PWM
• For Use With: 497-6426 - BOARD EVAL BASED ON STMPE2401
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-6133-2

Keypad controller
13.6
13.7
44/55
KPC_ctrl_lsb register
Table 42. KPC_ctrl_lsb register
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 43. KPC_data_byte0 register
Reset Value
Read/Write
Reset Value
Read/Write
Name
Bit
Bit
Name
7
6
5
4
3
2
1
0
Bit
Bit
7
6
5
4
3
2
1
0
W
7
0
Up/Down
Name
SCAN
DB_6
DB_5
DB_4
DB_3
DB_2
DB_1
DB_0
R
7
1
W
6
0
Up/Down
Name
R3
R2
R1
R0
C2
C1
C0
R3
R
6
1
W
5
0
0-128ms of de-bounce time
‘1’ to start scanning; ‘0’ to stop
DB_0 ~ 5
W
4
0
R2
R
5
1
‘0’ for key-down, ‘1’ for key-up
row number of key 1 (valid range : 0-11)
0x1111 for No Key
column number of key 1 (valid range : 0-7)
W
3
0
R1
R
4
1
Description
R0
R
3
1
Description
W
2
0
C2
R
2
0
W
1
0
C1
R
1
0
STMPE2401
SCAN
W
0
0
C0
R
0
0