X9251 Datasheet, PDF (14/25 Pages) Xicor Inc. – Quad Digitally-Controlled (XDCP) Potentiometer

X9251
Global Transfer Wiper Counter Register (WCR) to Data Register (DR)
CS ^{Device Type Device}
Instruction
DR
CS
Falling ^{Identifier Addresses Opcode Addresses} Rising
Edge _{0 1 0 1 0 0 A1 A0 1 0 0 0 RB RA 0 0} Edge
HIGH-VOLTAGE
WRITE CYCLE
Transfer Wiper Counter Register (WCR) to Data Register (DR)
CS ^{Device Type Device}
Instruction DR and WCR
Falling ^{Identifier Addresses Opcode}
Addresses
Edge _{0 1 0 1 0 0 A1 A0 1 1 1 0 RB RA 0 0}
CS
Rising
Edge
HIGH-VOLTAGE
WRITE CYCLE
Transfer Data Register (DR) to Wiper Counter Register (WCR)
CS ^{Device Type}
Device
Instruction DR and WCR _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)
CS ^{Device Type Device}
Instruction
WCR
Increment/Decrement
CS
Falling ^{Identifier Addresses Opcode Addresses}
(Sent by Master on SI)
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)
CS ^{Device Type}
Device
Instruction WCR
Data Byte
Falling ^Identifier
Addresses
Opcode Addresses
(Sent by X9251 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: (1) “A1 ~ A0”: stands for the device addresses sent by the master.
(2) WPx refers to wiper position data in the Counter Register
(2) “I”: stands for the increment operation, SI held HIGH during active SCK phase (high).
(3) “D”: stands for the decrement operation, SI held LOW during active SCK phase (high).
REV 1.3.3 2/10/04
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Characteristics subject to change without notice. 14 of 25