X9241A
Figure 6. Increment/Decrement Timing Limits
INC/DEC
CMD
ISSUED
SCL
t
CLWV
SDA
Voltage Out
V
W
/R
W
Table 1. Instruction Set
Instruction Format
Instruction
Read WCR
Write WCR
Read Data
Register
Write Data
Register
XFR Data
Register to
WCR
XFR WCR to
Data Register
Global XFR
Data Register to
WCR
Global XFR
WCR to Data
Register
Increment/
Decrement
Wiper
I
3
1
1
1
1
1
I
2
0
0
0
1
1
I
1
0
1
1
0
0
I
0
1
0
1
0
1
P
1
1/0
(10)
1/0
1/0
1/0
1/0
P
0
1/0
1/0
1/0
1/0
1/0
R
1
X
(11)
X
1/0
1/0
1/0
R
0
X
X
1/0
1/0
1/0
Operation
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
1
1
1
0
1/0
1/0
1/0
1/0
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
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)
REV 1.1.13 12/09/02
www.xicor.com
Characteristics subject to change without notice.
6 of 18
XICOR [ XICOR INC. ]
