X9271 Datasheet, PDF (11/23 Pages) Xicor Inc. – Single Digitally-Controlled (XDCP) Potentiometer

X9271
INSTRUCTION FORMAT
Read Wiper Counter Register (WCR)
CS
Falling
Edge
Device Type
Identifier
0101
Device
Addresses
0 0 A1 A0
Instruction
Opcode
1001
DR/Bank
Addresses
00 0 0
Wiper Position
(Sent by X9271 on SO)
CS
W W W W W W W W _Rising
C C C C C C C C _Edge
RRRRRRRR
76543210
Write Wiper Counter Register (WCR)
CS
Falling
Edge
Device Type
Identifier
0101
Device
Addresses
0 0 A1 A0
Instruction
Opcode
1010
DR/Bank
Addresses
00 0 0
Data Byte
(Sent by Host on SI)
CS
W W W W W W W W _Rising
C C C C C C C C _Edge
RRRRRRRR
76543210
Read Data Register (DR)
CS ^{Device Type Device}
Instruction
DR/Bank
Data Byte
CS
Falling ^{Identifier Addresses Opcode}
Addresses
(Sent by X9271 on SO)
Rising
Edge _{0 1 0 1 0 0 A1 A0 1 0 1 1 RB RA P1 P0 D7 D 6 D5 D4 D3 D2 D1 D0} Edge
Write Data Register (DR)
Device Type Device Instruction
DR/Bank
Data Byte
CS
Falling
Edge
Identifier
0101
Addresses
0 0 A1 A0
Opcode
Addresses
(Sent by Host on SI)
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}
Falling ^Identifier
Edge _{0 1 0 1}
Device
Instruction
Addresses Opcode
0 0 A1 A0 1 1 1 0
DR/Bank
Addresses
RB RA 0 0
CS
Rising
Edge
HIGH-VOLTAGE
WRITE CYCLE
REV 1.1.7 2/6/03
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Characteristics subject to change without notice. 11 of 23