X9271 Xicor, X9271 Datasheet - Page 12

• Manufacturer Part Number: X9271
• Description: Single Digitally-Controlled (XDCP) Potentiometer
• Manufacturer: Xicor

Transfer Data Register (DR) to Wiper Counter Register (WCR)
Increment/Decrement Wiper Counter Register (WCR)
Read Status Register (SR)
Notes: (1) “A1 ~ A0”: stands for the device addresses sent by the master.
X9271
REV 1.1.7 2/6/03
Falling
Falling
Falling
Edge
Edge
Edge
CS
CS
CS
(2) WCRx refers to wiper position data in the Wiper 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).
(4) “X:”: Don’t Care.
Device Type
0
Device Type
Device Type
0
0
Identifier
Identifier
Identifier
1
1
1
0
0
0
1 0 0 A1
1 0 0 A1
1 0 0
Addresses
Addresses
Addresses
Device
Device
Device
A1
A0 1 1 0 1 RB RA 0
A0 0 0 1 0 X X 0 0 I/D I/D
A0
Instruction
0 1 0 1 0 0 0 1 0 0 0 0 0 0 0
Instruction
Instruction
Opcode
Opcode
Opcode
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Addresses
Addresses
DR/Bank
DR/Bank
Addresses
DR/Bank
0
(Sent by X9271 on SO)
(Sent by Master on SDA)
Rising
Edge
Increment/Decrement
CS
Data Byte
.
Characteristics subject to change without notice.
.
.
.
I/D I/D
WIP
Rising
Edge
Rising
CS
Edge
CS
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