X9271 Xicor, X9271 Datasheet - Page 10

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

X9271
Figure 5. Increment/Decrement Instruction Sequence
Figure 6. Increment/Decrement Timing Limits
Table 6. Instruction Set
Note: 1/0 = data is one or zero
REV 1.1.7 2/6/03
Read Wiper Counter
Register
Write Wiper Counter
Register
Read Data Register
Write Data Register
XFR Data Register to
Wiper Counter Register
XFR Wiper Counter
Register to Data Register
Increment/Decrement
Wiper Counter Register
Read Status (WIP bit)
SCL
SI
CS
Instruction
ID3 ID2 ID1 ID0
0
Device ID
1
SCK
V W
SI
0
1
INC/DEC CMD ISSUED
0
0
I3
1
1
1
1
1
1
0
0
0
0
Internal
Address
A1 A0
I2
0
0
0
1
1
1
0
1
I1
0
1
1
0
0
1
1
0
Instruction Set
VOLTAGE OUT
I0
I3
1
0
1
0
1
0
0
1
Instruction
Opcode
I2
RB RA
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1/0
1/0
1/0
1/0
0
0
0
0
I1 I0
1/0
1/0
1/0
1/0
0
0
0
0
RA RB
Register
Address
1/0
1/0
P
0
0
0
0
0
0
1
1/0
1/0
1/0
1/0
P1
P
0
0
0
0
1
0
Address
Pot/Bank
P0
0
Read the contents of the Wiper Counter
Register
Write new value to the Wiper Counter
Register
Read the contents of the Data Register
pointed to by P1-P0 and RB-RA
Write new value to the Data Register
pointed to by P1-P0 and RB-RA
Transfer the contents of the Data Register
pointed to by RB-RA (Bank 0 only) to the
Wiper Counter Register
Transfer the contents of the Wiper Counter
Register to the Register pointed to by RB-RA
(Bank 0 only)
Enable Increment/decrement of the Wiper
Counter Register
Read the status of the internal write cycle, by
checking the WIP bit.
t WRID
Characteristics subject to change without notice.
N
C
1
I
N
C
2
I
Operation
N
C
n
I
D
E
C
1
D
E
C
n
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