X9421 Datasheet, PDF (10/21 Pages) Xicor Inc. – Single Digitally Controlled (XDCP) Potentiometer

X9421
Table 3. Instruction Set
Instruction
Read Wiper Counter
Register
Write Wiper Counter
Register
Instruction Set
I₃ I₂ I₁ I₀ R₁ R₀
10010 0 0
10100 0 0
Read Data Register
1 0 1 1 1/0 1/0 0
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)
1 1 0 0 1/0 1/0 0
1 1 0 1 1/0 1/0 0
1 1 1 0 1/0 1/0 0
00100 0 0
01010 0 0
Operation
0 Read the contents of the Wiper Counter Register
0 Write new value to the Wiper Counter Register
0
Read the contents of the Data Register pointed to
by R₁ - R₀
0
Write new value to the Data Register pointed to by
R₁ - R₀
0
Transfer the contents of the Data Register pointed
to by R₁ - R₀ to the Wiper Counter Register
0
Transfer the contents of the Wiper Counter
Register to the Data Register pointed to by R₁ - R₀
0
Enable Increment/decrement of the Wiper Counter
Register
1
Read the status of the internal write cycle, by
checking the WIP bit.
10
FN8196.1
September 23, 2005