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STMPE812A Datasheet(PDF) 38 Page - STMicroelectronics

No. de pieza STMPE812A
Descripción Electrónicos  Integrated 4-wire resistive touchscreen controller, pen-down/real-time mode, fullyautonomous
PDF  53 Pages
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Fabricante Electrónico  STMICROELECTRONICS [STMicroelectronics]
Página de inicio  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STMPE812A Datasheet(HTML) 38 Page - STMicroelectronics

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Touchscreen controller
STMPE812A
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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
0
0
4
[11:4] of X
[3:0] of X
[11:8] of Y
[7:0] of Y
[7:0] of Z
1
0
3
[11:4] of X
[3:0] of X
[11:8] of Y
[7:0] of Y
-
01
5
Data Valid
Status
[11:4] of X
[3:0] of X
[11:8] of Y
[7:0] of Y
[7:0] of Z
11
4
Data Valid
Status
[11:4] of X
[3:0] of X
[11:8] of Y
[7:0] of Y
-
76543
2
1
0
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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