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QST108 датащи(PDF) 25 Page - STMicroelectronics

номер детали QST108
подробное описание детали  Capacitive touch sensor device 8 keys with individual key state outputs or I2C interface
PDF  51 Pages
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производитель  STMICROELECTRONICS [STMicroelectronics]
домашняя страница  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

QST108 датащи(HTML) 25 Page - STMicroelectronics

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QST108
Device operating modes
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Key activation description
Key activation (Bit 7)
0: Key disabled
1: Key enabled
Key identifier (Bits 3:0)
0000: All keys
0101: Key 5
0001: Key 1
0110: Key 6
0010: Key 2
0111: Key 7
0011: Key 3
1000: Key 8
0100: Key 4
Low power mode description
Free Run in Detect (Bit 6)
0: Low Power mode is always enabled, whatever the state of the keys.
1: Low Power mode is automatically suspended when any key is in Detect state.
Low Power mode is automatically resumed when no key is in Detect state.
Sleep Duration Factor (Bits 5 to 0)
0x00 or 0x1A to 0x3E: Low power mode is disabled.
0x01 to 0x19: Low Power mode. The sleep duration is ‘Sleep Duration Factor’ x 20
milliseconds (20 ms to 500 ms)
0x3F: Deep Sleep mode is entered immediately. A reset or any I2C
communication can be used to exit Deep Sleep mode.
Note:
When the device is in Sleep or Deep Sleep, any I2C bus activity will wake-up the device.
The I2C QST device address is not acknowledged but forces the QST device to exit from
Low Power mode. The Master device will have to repeat the command to ensure that it is
taken in account.
Table 14.
KeyActivation
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Key
Activation
0
0
0
Key ID (binary coded)
Table 15.
SetLowPower
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
0
Free Run
in Detect
Sleep Duration Factor



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