STMPE812A datasheet(38/53 Pages) STMICROELECTRONICS

No de pièce	STMPE812A

Description	Integrated 4-wire resistive touchscreen controller, pen-down/real-time mode, fullyautonomous

PDF	53 Pages

Scroll/Zoom	100%

Fabricant	STMICROELECTRONICS [STMicroelectronics]

Site Internet	http://www.st.com

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38 / 53 page

Touchscreen controller

STMPE812A

38/53

Doc ID 18225 Rev 4

Data Valid Status Byte Structure

Data Valid Status Read in data port is useful together with Pen Down mode whereby

accessing the ISR is not needed so as to achieve the best I2C bandwidth efficiency (i.e.

minimal I2C transactions).

Note:

Reading the Data valid Status byte also clears the ISR.

Table 13.

Touchscreen controller data register

TSCDetectConfig2

Number of

bytes to read

from

TSCData

Byte0

Byte1

Byte2

Byte3

Byte4

OpMode

StatusRead

[11:4] of X

[3:0] of X

[11:8] of Y

[7:0] of Y

[7:0] of Z

[11:4] of X

[3:0] of X

[11:8] of Y

[7:0] of Y

Data Valid

Status

[11:4] of X

[3:0] of X

[11:8] of Y

[7:0] of Y

[7:0] of Z

Data Valid

Status

[11:4] of X

[3:0] of X

[11:8] of Y

[7:0] of Y

76543

RESERVED

DATA VALID

RESERVED

[7:2] RESERVED

[1] DATA VALID

1: Touch data available/valid

0: Touch data not available/not valid

Bit reset upon read

[0] RESERVED

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