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X9111 Datasheet, PDF (9/21 Pages) Xicor Inc. – Single Digitally-Controlled Potentiometer
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X9111 – Preliminary Information
Table 6. Instruction Set
Instruction Set
Instruction
Read Wiper Counter
Register
R/W I3 I2 I1 0 RB RA 0 0
Operation
1 1 0 0 0 0 0 0 0 Read the contents of the Wiper
Counter Register
Write Wiper Counter
Register
0 1 0 1 0 0 0 0 0 Write new value to the Wiper
Counter Register
Read Data Register
1 1 0 1 0 1/0 1/0 0 0 Read the contents of the Data
Register pointed to RB-RA
Write Data Register
0 1 1 0 0 1/0 1/0 0 0 Write new value to the Data
Register pointed to RB-RA
XFR Data Register to
Wiper Counter Register
1 1 1 0 0 1/0 1/0 0 0 Transfer the contents of the Data
Register pointed to by RB-RA to
the Wiper Counter Register
XFR Wiper Counter
Register to Data Register
0 1 1 1 0 1/0 1/0 0 0 Transfer the contents of the Wiper
Counter Register to the Data
Register pointed to by RB-RA
Read Status (WIP bit)
1 0 1 0 0 0 0 0 1 Read the status of the internal write
cycle, by checking the WIP bit
(read status register).
Note: (1) 1/0 = data is one or zero
INSTRUCTION FORMAT
Read Wiper Counter Register (WCR)
CS
Falling
Edge
Device Type
Identifier
0101
Device
Addresses
0 A1 A0
Instruction
Opcode
1000
Register
Addresses
0000
Wiper Position
Wiper Position
(Sent by X9111 on SO)
(sent by X9111 on SO)
CS
W W W W W W W W W W Rising
X
X
X
X
X
X
C
R
C
R
C
R
C
R
C
R
C
R
C
R
C
R
C
R
C
R
Edge
9876543210
Write Wiper Counter Register (WCR)
CS
Falling
Edge
Device Type
Identifier
0101
Device
Addresses
0 A1 A0
Instruction
Opcode
1010
Register
Addresses
0000
Wiper Position
Wiper Position
(Sent by Master on SI)
(Sent by Master on SI)
CS
W W W W W W W W W W Rising
X
X
X
X
X
X
C
R
C
R
C
R
C
R
C
R
C
R
C
R
C
R
C
R
C
R
Edge
9876543210
Read Data Register (DR)
CS
Falling
Edge
Device Type
Identifier
0101
Device
Addresses
0 A1 A0
Instruction
Opcode
1010
Register
Addresses
RB RA 0 0
Wiper Position
Wiper Position
(Sent by X9111 on SO)
(sent by X9111 on SO)
CS
W W W W W W W W W W Rising
X
X
X
X
X
X
C
R
C
R
C
R
C
R
C
R
C
R
C
R
C
R
C
R
C
R
Edge
9876543210
REV 1.1.15 5/9/03
www.xicor.com
Characteristics subject to change without notice. 9 of 21
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