STMPE812ABJR STMicroelectronics, STMPE812ABJR Datasheet - Page 17

• 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

STMPE812A
6
STMPE812A registers
This section lists and describes the registers of the STMPE812A device, starting with a
register map and then provides detailed descriptions of register types.
Table 7.
Registers from 0x00 - 0x0F are always accessible.
Registers from 0x10 - 0x1F are accessible only if “GPIO_OFF” bit in SYS_CTRL is set to “0”.
Registers from 0x20 - 0x2F are accessible only if “ADC_OFF” bit in SYS_CTRL is set to “0”.
Registers from 0x40 - 0x4F are accessible only if “TSC_OFF” bit in SYS_CTRL is set to “0”.
0x00 - 01
0x06 - 07
0x21 - 22
Address
0x0A
0x02
0x03
0x04
0x08
0x09
0x10
0x11
0x12
0x13
0x14
0x20
0x40
0x41
0x42
0x43
Register summary map table
CHIP_ID
ID_VER
SYS_CTRL
PORT_FUNCTI
ON
SCRATCH_PAD
INT_CTRL
INT_EN
INT_STA
GPIO_SET_PIN
GPIO_CLR_PIN
GPIO_MP_STA
GPIO_DIR
GPIO_ED
ADC_CTRL
ADC_DATA
TSC_CTRL
TSC_DET_CFG
1
TSC_DET_CFG
2
TSC_SAMPLIN
G_RATE
Register name
Doc ID 18225 Rev 4
Bit
16
16
16
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
Type
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R
R
R
R
Reset value
0xA812
0x0000
0xA4
0xB0
0x0A
0x10
0x0F
0xF8
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x33
0x00
Device identification
Revision number
0x10 for engineering sample
System control register
Port function control register
General purpose storage
register
Interrupt control register
interrupt enable register
Interrupt status register
GPIO set pin register
GPIO clear pin register
GPIO monitor pin state
register
GPIO falling edge register
GPIO rising edge register
ADC control
ADC data
4-wire touchscreen
controller setup
Touchscreen controller
configuration 1
Touchscreen controller
configuration 2
Touchscreen controller
sampling rate register
STMPE812A registers
Function
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