X9241A
Characteristics subject to change without notice.
6 of 18
REV 1.1.13 12/09/02
www.xicor.com
Figure 6. Increment/Decrement Timing Limits
Table 1. Instruction Set
Notes:
(10) 1/0 = data is one or zero
(11) X = Not applicable or don’t care; that is, a data register is not involved in the operation and need not be addressed (typical)
Instruction
Read WCR
Instruction Format
I
0
P
1
1
1/0
(10)
Operation
I
3
1
I
2
0
I
1
0
P
0
1/0
R
1
X
(11)
R
0
X
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 Register
pointed to by P
1
–P
0
and R
1
–R
0
Write new value to the Register pointed
to by P
1
–P
0
and R
1
–R
0
Transfer the contents of the Register
pointed to by P
1
–P
0
and R
1
–R
0
to its
associated WCR
Transfer the contents of the WCR
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 WCR
Transfer the contents of all WCRs to their
respective data Registers pointed to by
R
1
–R
0
of all four pots
Enable Increment/decrement of the
WCR pointed to by P
1
–P
0
Write WCR
1
0
1
0
1/0
1/0
X
X
Read Data
Register
Write Data
Register
XFR Data
Register to
WCR
XFR WCR to
Data Register
1
0
1
1
1/0
1/0
1/0
1/0
1
1
0
0
1/0
1/0
1/0
1/0
1
1
0
1
1/0
1/0
1/0
1/0
1
1
1
0
1/0
1/0
1/0
1/0
Global XFR
Data Register to
WCR
Global XFR
WCR to Data
Register
Increment/
Decrement
Wiper
0
0
0
1
X
X
1/0
1/0
1
0
0
0
X
X
1/0
1/0
0
0
1
0
1/0
1/0
X
X
SCL
SDA
V
W
/R
W
INC/DEC
CMD
ISSUED
Voltage Out
t
CLWV