X9241A
Figure 6. Increment/Decrement Timing Limits
INC/DEC
CMD
ISSUED
t
CLWV
SCL
SDA
Voltage Out
V
/R
W
W
Table 1. Instruction Set
Instruction Format
Instruction
I
I
I
I
P
1/0(10)
P
R
X(11)
R
0
Operation
Read the contents of the Wiper Counter
Register pointed to by P –P
3
2
1
0
1
0
1
Read WCR
1
1
1
1
1
0
0
0
1
1
0
1
1
0
0
1
0
1
0
1
1/0
1/0
1/0
1/0
1/0
X
1
0
Write WCR
1/0
X
X
Write new value to the Wiper Counter
Register pointed to by P –P
1
0
Read Data
Register
1/0
1/0
1/0
1/0
1/0
1/0
1/0
Read the contents of the Register
pointed to by P –P and R –R
1
0
1
0
Write Data
Register
1/0
Write new value to the Register pointed
to by P –P and R –R
1
0
1
0
XFR Data
Register to
WCR
1/0
Transfer the contents of the Register
pointed to by P –P and R –R to its
1
0
1
0
associated WCR
XFR WCR to
Data Register
1
0
1
0
1
0
0
0
1
0
0
1
0
1
0
0
1/0
X
1/0
X
1/0
1/0
1/0
X
1/0
1/0
1/0
X
Transfer the contents of the WCR
pointed to by P –P to the Register
1
0
pointed to by R –R
1
0
Global XFR
DataRegisterto
WCR
Transfer the contents of the Data
Registers pointed to by R –R of all four
1
0
pots to their respective WCR
Global XFR
WCR to Data
Register
X
X
Transfer the contents of all WCRs to their
respective data Registers pointed to by
R –R of all four pots
1
0
Increment/
Decrement
Wiper
1/0
1/0
Enable Increment/decrement of the
WCR pointed to by P –P
1
0
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)
Characteristics subject to change without notice. 6 of 18
REV 1.1.13 12/09/02
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