X9251TB24 XICOR [Xicor Inc.], X9251TB24 Datasheet - Page 14

• Manufacturer Part Number: X9251TB24
• Description: Quad Digitally-Controlled (XDCP) Potentiometer
• Manufacturer: XICOR [Xicor Inc.]

X9251
Global Transfer Wiper Counter Register (WCR) to Data Register (DR)
Transfer Wiper Counter Register (WCR) to Data Register (DR)
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.
REV 1.3.3 2/10/04
Falling
Falling
Falling
Falling
Falling
Edge
Edge
Edge
Edge
Edge
CS
CS
CS
CS
CS
(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).
Device Type
Device Type
Device Type
Device Type
0 1 0 1 0 0 A1 A0 1 0 0 0 RB RA 0 0
0 1 0 1 0 0 A1 A0 1 1 1 0 RB RA 0
Device Type
0
0
0
Identifier
Identifier
Identifier
Identifier
Identifier
1
1
1
0
0
0
1 0 0 A1 A0 1 1 0 1 RB RA 0
1 0 0 A1 A0 0 0 1 0 X X 0 0 I/D I/D
1 0 0 A1 A0 0 1 0 1 0 0 0 1 0
Addresses
Addresses
Addresses
Addresses
Addresses
Device
Device
Device
Device
Device
Instruction
Instruction
Instruction
Instruction
Opcode
Opcode
Instruction
Opcode
Opcode
Opcode
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DR and WCR
Addresses
DR and WCR
Addresses
Addresses
Addresses
Addresses
WCR
WCR
DR
0
0
Rising
Edge
CS
Rising
Edge
Rising
(Sent by X9251 on SO)
Edge
0
CS
(Sent by Master on SI)
Increment/Decrement
CS
0
.
Data Byte
HIGH-VOLTAGE
0
HIGH-VOLTAGE
WRITE CYCLE
WRITE CYCLE
Characteristics subject to change without notice.
.
0
.
0
. I/D I/D
0
WIP
Rising
Edge
Rising
CS
Edge
CS
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