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STMPE1208S Datasheet(PDF) 27 Page - STMicroelectronics

Part # STMPE1208S
Description  Xpander Logic with 12-channel touchkey
PDF  51 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STMPE1208S Datasheet(HTML) 27 Page - STMicroelectronics

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STMPE1208S
Register map and function description
27/51
CTRL_1
Control register 1
Address:
0x24
Type:
R/W
Reset:
0x00
Description:
Control register.
7654
3
2
1
0
-
F2A
PDIV[1:0]
NDIV
HDC_U
HDC_C
HOLD_C
[7] RESERVED
[6] F2A:
Write '1' to force the device to stay in active mode at all times. For best performance and
stability, this bit must be set to ‘1’ at all times.
[5:4] PDIV[1:0]:
'00' : System clock = 1.6MHz
'01' : System clock = 800KHz
'10' : System clock = 400KHz
'11' : System clock = 200KHz
[3] NDIV:
Sensor clock frequency setting:
'0' :sensor clock = system clock / 80
'1' :sensor clock = system clock / 160
Initial calibration time = sensor clock * 150
[2] HDC_U:
Unconditional host driven calibration. Executes an unconditional calibration. This is valid only if
"Hold C" bit is set, and device in Active mode. Reads '0' when calibration is completed.
[1] HDC_C:
Conditional host driven calibration. Executes a calibration if no touch is being sensed.
[0] HOLD_C:
'0' for auto-calibration mode
'1' disables auto-calibration



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