QST108KT6 STMicroelectronics, QST108KT6 Datasheet - Page 25

• Manufacturer Part Number: QST108KT6
• Manufacturer: STMicroelectronics

Specifications of QST108KT6

• Lead Free Status / Rohs Status: Compliant

QST108
Note:
Key activation description
Table 14.
Key activation (Bit 7)
Key identifier (Bits 3:0)
Low power mode description
Table 15.
Free Run in Detect (Bit 6)
Sleep Duration Factor (Bits 5 to 0)
When the device is in Sleep or Deep Sleep, any I
The I
Low Power mode. The Master device will have to repeat the command to ensure that it is
taken in account.
Activation
Bit 7
Bit 7
Key
0: Key disabled
1: Key enabled
0000: All keys
0001: Key 1
0010: Key 2
0011: Key 3
0100: Key 4
0
2
C QST device address is not acknowledged but forces the QST device to exit from
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.
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.
KeyActivation
SetLowPower
Free Run
in Detect
Bit 6
Bit 6
0
Bit 5
Bit 5
0
0101: Key 5
0110: Key 6
0111: Key 7
1000: Key 8
Bit 4
Bit 4
0
Sleep Duration Factor
2
Bit 3
Bit 3
C bus activity will wake-up the device.
Key ID (binary coded)
Bit 2
Bit 2
Device operating modes
Bit 1
Bit 1
Bit 0
Bit 0
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