X9241
Table 1. Instruction Set
Instruction
Read WCR
Write WCR
Read Data
Register
Write Data
Register
XFR Data Reg-
ister to WCR
XFR WCR to
Data Register
Global XFR Data
Register to WCR
Global XFR WCR
to Data Register
Increment/Decre-
ment Wiper
I
3
1
1
1
1
1
I
2
0
0
0
1
1
Instruction Format
I
1
I
0
P
1
P
0
R
1
R
o
0
1 1/0
(7)
1/0 N/A
(8)
N/A
1
1
0
0
0
1
0
1
1/0
1/0
1/0
1/0
1/0
1/0
1/0
1/0
N/A
1/0
1/0
1/0
N/A
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 all four Data
Registers pointed to by R
1
–R
0
to their
respective WCR
Transfer the contents of all WCRs
to their respective data Registers
pointed to by R
1
–R
0
Enable Increment/decrement of the
WCR pointed to by P
1
–P
0
3864 PGM T02.1
1
1
1
0
1/0
1/0
1/0
1/0
0
0
0
1
N/A
N/A
1/0
1/0
1
0
0
0
N/A
N/A
1/0
1/0
0
0
1
0
1/0
1/0
N/A
N/A
Notes:
(7) 1/0 = data is one or zero
(8) N/A = Not applicable or don't care; that is, a data register is not involved in the operation and need not be addressed (typical)
Figure 7. Acknowledge Response from Receiver
SCL FROM
MASTER
1
8
9
DATA
OUTPUT
FROM
TRANSMITTER
DATA
OUTPUT
FROM
RECEIVER
START
ACKNOWLEDGE
3864 ILL F14
6
XICOR [ XICOR INC. ]
