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STMPE811 Datasheet(PDF) 33 Page - STMicroelectronics

Part # STMPE811
Description  8-bit port expander with advanced touchscreen controller
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STMPE811 Datasheet(HTML) 33 Page - STMicroelectronics

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STMPE811
Touchscreen controller
33/54
TSC_CFG
Touchscreen controller configuration register
Address:
0x41
Type:
R/W
Description:
Touchscreen controller configuration register.
7654
3
2
1
0
AVE_CTRL_1 AVE_CTRL_0
TOUCH_DET
_DELAY_2
TOUCH_DET
_DELAY_1
TOUCH_DET
_DELAY_0
SETTLING_2
SETTLING_1
SETTLING_0
[7] AVE_CTRL_1: Average control
00 = 1 sample
01 = 2 samples
10 = 4 samples
11 = 8 samples
[6] AVE_CTRL_0: Average control
00 = 1 sample
01 = 2 samples
10 = 4 samples
11 = 8 samples
[5] TOUCH_DET_DELAY_2: Touch detect delay
000 = 10
μs
001 = 50
μs
[4] TOUCH_DET_DELAY_1: Touch detect delay
000 = 10
μs
001 = 50
μs
[3] TOUCH_DET_DELAY_0: Touch detect delay
010 = 100
μs
011 = 500
μs
100=1ms
101=5ms
110 = 10 ms
111 = 50 ms
[2:0] SETTLING: Panel driver settling time(1)
000 = 10
μs
001 = 100
μs
010 = 500
μS
011=1ms
100=5ms
101 = 10 ms
110 = 50 ms
111=100ms
1. For large panels (> 6”), a capacitor of 10 nF is recommended at the touchscreen terminals for noise filtering.
In this case, settling time of 1 ms or more is recommended.


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