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STMPE16M31PX датащи(PDF) 22 Page - STMicroelectronics

номер детали STMPE16M31PX
подробное описание детали  S-Touch® 16-channel touchkey controller with proximity sensing
PDF  75 Pages
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производитель  STMICROELECTRONICS [STMicroelectronics]
домашняя страница  http://www.st.com
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STMPE16M31PX датащи(HTML) 22 Page - STMicroelectronics

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System controller
STMPE16M31PX
22/75
Doc ID 17058 Rev 2
SYSCON-2
Sensor and PWM clock divider
Address:
0x04
Type:
R/W
Reset:
0xFE
Description:
Sensor and PWM clock divider. The SYSCON-2 register controls the sensor and
PWM clock speed, and the clock gating of various functional modules.
This bit will always read '0'. as the I2C transaction to read this bit will wake up the
device from hibernate mode.
76
543
210
SCLK_DIV
PCLK_DIV
GPIO_CLK
PWM_CLK
CS_CLK
RW
RW
RW
RW
11
1
0
[7:5] SCLK_DIV: Sensor clock divider.
000, 001: RESERVED
010 : 32 (to be used only if load capacitance is < 30 pF)
011: 64
100: 128
101: 256
110: 512
111: 1024
Sensor clock is 2 MHz / ( PRBS_Factor * SCLK_DIV[2:0] )
PRBS factor is a pseudo-random sequence of number, ranging from 1-8. This is used to reduce
the effect of surrounding EMI on the sensor. Average of this factor is approximately 2.5
Effective sampling rate is 2 MHz/ (2.5*SCLK_DIV[2:0]).
Maximum total sampling rate : 2MHz/(2.5*64) = 12.5 kHz
Minimum total sampling rate : 2 MHz/(2.5*1024) = 780 Hz
If N channel is active, the per-channel sampling rate is “total sampling rate / N”.
Maximum channel sampling rate = 12.5 kHz/24 = 521 Hz
[4:3] PCLK_DIV: PWM clock divider
00 for 16 kHz
01 for 32 kHz
10 for 64 kHz
11 for 128 kHz
Obsolete
Product(s)
- Obsolete
Product(s)



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