X9271_14 Datasheet, PDF (10/18 Pages) Intersil Corporation – Single, Digitally Controlled Potentiometer

X9271
Read Data Register (DR)
CS
Falling
Edge
Device Type
Identifier
0101
Device
Addresses
Instruction
Opcode
DR/Bank
Addresses
Data Byte
(Sent by X9271 on SO)
0 0 A1 A0 1 0 1 1 RB RA P1 P0 D7 D 6 D5 D4 D3 D2 D1 D0
CS
Rising
Edge
Write Data Register (DR)
CS
Falling
Edge
Device Type
Identifier
0101
Device
Addresses
Instruction
Opcode
DR/Bank
Addresses
Data Byte
(Sent by Host on SI)
0 0 A1 A0 1 1 0 0 RB RA P1 P0 D7 D 6 D5 D4 D3 D2 D1 D0
CS
Rising
Edge
Transfer Wiper Counter Register (WCR) to Data Register (DR)
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 1 0 RB RA 0 0} Edge
HIGH-VOLTAGE
WRITE CYCLE
Transfer Data Register (DR) to Wiper Counter Register (WCR) (Notes 5, 6)
CS
Falling
Edge
Device Type
Identifier
0101
Device
Addresses
0 0 A1 A0
Instruction
Opcode
DR/Bank
Addresses
1 1 0 1 RB RA 0 0
CS
Rising
Edge
Increment/Decrement Wiper Counter Register (WCR) (Notes 5, 6, 7, 8, 9)
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 5)
CS
Falling
Edge
Device Type
Identifier
0101
Device
Addresses
0 0 A1 A0
Instruction
Opcode
DR/Bank
Addresses
Data Byte
(Sent by X9271 on SO)
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. WCRx refers to wiper position data in the Wiper 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).
9. “X:”: Don’t Care.
CS
Rising
Edge
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FN8174.4
July 18, 2014