STMPE811 datasheet(36/66 Pages) STMICROELECTRONICS

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Touchscreen controller

STMPE811

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Doc ID 14489 Rev 5

Oversampling and averaging function

The STMPE811 touchscreen controller can be configured to oversample by 2/4/8 times and

provide the averaged value as final output. This feature helps to reduce the effect of

surrounding noise.

Table 15.

Touchscreen controller register summary table

Address

Bit

Type

Function

0x40

TSC_CTRL

R/W

4-wire touchscreen controller setup

0x41

TSC_CFG

R/W

TSC configuration register

0x42

WDW_TR_X

R/W

Window setup for top right X

0x44

WDW_TR_Y

R/W

Window setup for top right Y

0x46

WDW_TR_X

R/W

Window setup for bottom left X

0x48

WDW_TR_Y

R/W

Window setup for bottom left Y

0x4A

FIFO_TH

R/W

FIFO level to generate interrupt

0x4B

FIFO_STA

R/W

Current status of FIFO

0x4C

FIFO_SIZE

Current filled level of FIFO

0x4D

TSC_DATA_X

Data port for TSC data access

0x4F

TSC_DATA_Y

Data port for TSC data access

0x51

TSC_DATA_Z

Data port for TSC data access

0x52

TSC_DATA_XYZ

Data port for TSC data access

0x56

TSC_FRACT_Z

R/W

Touchscreen controller FRACTION_Z

0x57

TSC_DATA

Touchscreen controller data access port

0x58

TSC_I_DRIVE

R/W

Touchscreen controller drive I

0x59

TSC_SHIELD

R/W

Touchscreen controller shield

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