X9271_11 Datasheet, PDF (13/22 Pages) Intersil Corporation – Single, Digitally Controlled (XDCP™) Potentiometer

X9271
Transfer Data Register (DR) to Wiper Counter Register (WCR) (Notes 6, 7)
CS ^{Device Type}
Device
Instruction
DR/Bank
CS
Falling ^Identifier
Addresses
Opcode
Addresses _Rising
Edge _{0 1 0 1 0 0 A1 A0 1 1 0 1 RB RA 0 0} Edge
Increment/Decrement Wiper Counter Register (WCR) (Notes 6, 7, 8, 9, 10)
CS ^{Device Type}
Device
Instruction DR/Bank
Increment/Decrement
CS
Falling ^Identifier
Addresses
Opcode Addresses
(Sent by Master on SDA) _Rising
Edge _{0 1 0 1 0 0 A1 A0 0 0 1 0 X X 0 0 I/D I/D . . . . I/D I/D} Edge
Read Status Register (SR) (Note 6)
CS ^{Device Type}
Device
Instruction DR/Bank
Data Byte
Falling ^Identifier
Addresses
Opcode Addresses
(Sent by X9271 on SO)
Edge _{0 1 0 1 0 0 A1 A0 0 1 0 1 0 0 0 1 0 0 0 0 0 0 0 WIP}
CS
Rising
Edge
NOTES:
6. “A1 ~ A0”: stands for the device addresses sent by the master.
7. WCRx refers to wiper position data in the Wiper Counter Register.
8. “I”: stands for the increment operation. SI held HIGH during active SCK phase (high).
9. “D”: stands for the decrement operation. SI held LOW during active SCK phase (high).
10. “X:”: Don’t Care.
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FN8174.3
June 23, 2011