X9421 Xicor, X9421 Datasheet - Page 9

• Manufacturer Part Number: X9421
• Description: Single Digitally Controlled (XDCP) Potentiometer
• Manufacturer: Xicor

X9421
Table 3. Instruction Set
REV 1.1.6 8/1/02
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)
Instruction
I
1
1
1
1
1
1
0
0
3
I
0
0
0
1
1
1
0
1
2
I
0
1
1
0
0
1
1
0
1
Instruction Set
I
1
0
1
0
1
0
0
1
0
1/0 1/0
1/0 1/0
1/0 1/0
1/0 1/0
R
0
0
0
0
1
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R
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
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 R
Write new value to the Data Register pointed to by
R
Transfer the contents of the Data Register pointed
to by R
Transfer the contents of the Wiper Counter
Register to the Data Register pointed to by R
Enable Increment/decrement of the Wiper Counter
Register
Read the status of the internal write cycle, by
checking the WIP bit.
1
–R
1
0
–R
1
–R
0
0
Characteristics subject to change without notice.
to the Wiper Counter Register
Operation
1
9 of 21
–R
0