STMPE812A datasheet(17/53 Pages) STMICROELECTRONICS

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STMPE812A

STMPE812A registers

Doc ID 18225 Rev 4

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STMPE812A registers

This section lists and describes the registers of the STMPE812A device, starting with a

Table 7.

Address

Bit

Type

Reset value

Function

Registers from 0x00 - 0x0F are always accessible.

0x00 - 01

CHIP_ID

0xA812

Device identification

0x02

ID_VER

0x10

Revision number

0x10 for engineering sample

0x03

SYS_CTRL

R/W

0x0F

System control register

0x04

PORT_FUNCTI

R/W

0xF8

Port function control register

0x06 - 07

SCRATCH_PAD

R/W

0x00

General purpose storage

0x08

INT_CTRL

R/W

0x00

Interrupt control register

0x09

INT_EN

R/W

0x00

interrupt enable register

0x0A

INT_STA

0x00

Interrupt status register

Registers from 0x10 - 0x1F are accessible only if “GPIO_OFF” bit in SYS_CTRL is set to “0”.

0x10

GPIO_SET_PIN

R/W

0x00

GPIO set pin register

0x11

GPIO_CLR_PIN

R/W

0x00

GPIO clear pin register

0x12

GPIO_MP_STA

R/W

0x00

GPIO monitor pin state

0x13

GPIO_DIR

R/W

0x00

GPIO falling edge register

0x14

GPIO_ED

R/W

0x00

GPIO rising edge register

Registers from 0x20 - 0x2F are accessible only if “ADC_OFF” bit in SYS_CTRL is set to “0”.

0x20

ADC_CTRL

R/W

0x33

ADC control

0x21 - 22

ADC_DATA

0x0000

ADC data

Registers from 0x40 - 0x4F are accessible only if “TSC_OFF” bit in SYS_CTRL is set to “0”.

0x40

TSC_CTRL

R/W

0x00

4-wire touchscreen

controller setup

0x41

TSC_DET_CFG

8R/W

0xA4

Touchscreen controller

configuration 1

0x42

TSC_DET_CFG

8R/W

0xB0

Touchscreen controller

configuration 2

0x43

TSC_SAMPLIN

G_RATE

8R/W

0x0A

Touchscreen controller

sampling rate register

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