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X9400
Characteristics subject to change without notice.
7 of 22
REV 1.1.4 10/11/02
www.xicor.com
Figure 8. Increment/Decrement Timing Limits
Table 1. Instruction Set
Instruction
Instruction Set
I
1
I
0
0
1
Operation
I
3
1
I
2
0
R
1
R
0
0
P
1
P
1
P
0
P
0
Read Wiper Counter Register
0
Read the contents of the Wiper Counter Register
pointed to by P
1
-P
0
Write new value to the Wiper Counter Register
pointed to by P
1
-P
0
Read the contents of the Data Register pointed
to by P
1
-P
0
and R
1
–R
0
Write new value to the Data Register pointed to
by P
1
-P
0
and R
1
–R
0
Transfer the contents of the Data Register pointed
to by R
1
–R
0
to the Wiper Counter Register pointed
to by P
1
-P
0
Transfer the contents of the Wiper Counter
Register pointed to by P
1
-P
0
to the Register
pointed to by R
1
–R
0
Transfer the contents of the Data Registers
pointed to by R
1
–R
0
of all four pots to their
respective Wiper Counter Register
Transfer the contents of all Wiper Counter
Registers to their respective data Registers
pointed to by R
1
–R
0
of all four pots
Enable Increment/decrement of the Wiper
Counter Register pointed to by P
1
-P
0
Read the status of the internal write cycle, by
checking the WIP bit.
Write Wiper Counter Register
1
0
1
0
0
0
P
1
P
0
Read Data Register
1
0
1
1
R
1
R
0
P
1
P
0
Write Data Register
1
1
0
0
R
1
R
0
P
1
P
0
XFR Data Register to Wiper
Counter Register
1
1
0
1
R
1
R
0
P
1
P
0
XFR Wiper Counter Register
to Data Register
1
1
1
0
R
1
R
0
P
1
P
0
Global XFR Data Register to
Wiper Counter Register
0
0
0
1
R
1
R
0
0
0
Global XFR Wiper Counter
Register to Data Register
1
0
0
0
R
1
R
0
0
0
Increment/Decrement Wiper
Counter Register
Read Status (WIP bit)
0
0
1
0
0
0
P
1
P
0
0
1
0
1
0
0
0
1
SCK
SI
V
W
/R
W
INC/DEC CMD Issued
t
WRID
Voltage Out