X9251_14 Datasheet, PDF (11/21 Pages) Intersil Corporation – Single Supply/Low Power/256-Tap/SPI Bus, Quad Digitally-Controlled Potentiometer

X9251
Transfer Data Register (DR) to Wiper Counter Register (WCR)
CS FALLING
EDGE
DEVICE TYPE
IDENTIFIER
0101
DEVICE
ADDRESSES
0 0 A1 A0
INSTRUCTION
OPCODE
1101
DR AND WCR
ADDRESSES
CS RISING
EDGE
RB RA 0 0
Increment/Decrement Wiper Counter Register (WCR)
CS
FALLING
EDGE
DEVICE TYPE
IDENTIFIER
0101
DEVICE
ADDRESSES
0 0 A1 A0
INSTRUCTION
OPCODE
0010
WCR
ADDRESSES
XX00
INCREMENT/DECREMENT
CS
(SENT BY MASTER ON SI)
RISING
EDGE
I/D I/D . . . . I/D I/D
Read Status Register (SR)
CS DEVICE TYPE
DEVICE
INSTRUCTION
WCR
DATA BYTE
FALLIN IDENTIFIER
ADDRESSES
OPCODE ADDRESSES
(SENT BY X9251 ON SO)
G 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
NOTES:
5. “A1 ~ A0”: stands for the device addresses sent by the master.
6. WPx refers to wiper position data in the Counter Register
7. “I”: stands for the increment operation, SI held HIGH during active SCK phase (high).
8. “D”: stands for the decrement operation, SI held LOW during active SCK phase (high).
CS
RISING
EDGE
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FN8166.6
December 3, 2014