STMPE812ABJR STMicroelectronics, STMPE812ABJR Datasheet - Page 34

• Manufacturer Part Number: STMPE812ABJR
• Description: Touch Screen Converters & Controllers Touchscreen cntrlr S-Touch
• Manufacturer: STMicroelectronics
• Type: Resistive Touch Controllersr

Specifications of STMPE812ABJR

• Rohs: yes
• Input Type: 1 TSC
• Data Rate: 400 kbps
• Resolution: 12 bit
• Interface Type: 4-wire, I2C
• Supply Voltage: 1.65 V to 3.6 V
• Supply Current: 100 uA
• Operating Temperature: - 40 C to + 85 C
• Package / Case: CSP-12
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Supply Voltage - Max: 3.6 V
• Supply Voltage - Min: 1.65 V

Touchscreen controller
TSC CTRL
Address:
Type:
Reset:
Description:
34/53
7
MAV_MODE[2:0]
[7:5] MAV_MODE[2:0]
[3:2] Precharge[1:0]
[1:0] Current Limit [1:0]
[4] ACQ
6
0
0x40
R/W
0x00
Touchscreen control register.
‘000’ – MAV filter disabled
‘001’ – 6 remove 2
‘010’ – 8 remove 4
‘011’ – 10 remove 2
‘100’ – 12 remove 4
‘101’ – 20 remove 4
‘110’ – 4 remove none (equal to 4 x oversampling)
‘111’ – 8 remove none (equal to 8 x oversampling)
Only valid in acquisition mode ‘01’ (acquisition initiated by system host writing to ACQ bit)
Writing ‘1’ to this bit initiates a TSC data acquisition
Writing ‘0’ has no effect
Reads ‘1’ if data acquisition is in progress
Reads ‘0’ if data is ready
If Data is already available in buffer and not read by system host, setting this bit to ‘1’ renders
the data in buffer “invalid”. DATA available bit in Interrupt Status register is reset by hardware
automatically. Pending interrupt due to DATA available (if any) is cleared.
Data pointer in multi-byte read operation is reset when this bit is written to.
Pre-charge driver for touch detection
‘00’ – no pre-charge
‘01’ – 2 µs pre-charge
‘10’ – 4 µs pre-charge
‘11’ – 8 µs pre-charge
Current limit of touchscreen driver
‘00’ – 5 mA
‘01’ – 10 mA
‘10’ – 20 mA
‘11’ – 30 mA
5
ACQ
4
0
Doc ID 18225 Rev 4
3
Precharge[1:0]
0
2
TSC control register
1
Current Limit [1:0]
0
STMPE812A
0