X9221 Xicor, X9221 Datasheet - Page 6

• Manufacturer Part Number: X9221
• Description: Dual E2POT Nonvolatile Digital Potentiometer
• Manufacturer: Xicor

X9221
Table 1. Instruction Set
Notes: (7) 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
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
Instruction
TRANSMITTER
SCL FROM
RECEIVER
MASTER
OUTPUT
OUTPUT
FROM
FROM
DATA
DATA
1
1
1
1
1
1
0
1
0
I
3
START
I
0
0
0
1
1
1
0
0
0
2
I
0
1
1
0
0
1
0
0
1
1
Instruction Format
I
1
0
1
0
1
0
1
0
0
1
0
N/A
N/A
0
0
0
0
0
0
0
0
N/A
N/A
1/0
1/0
1/0
1/0
1/0
1/0
1/0
P
0
6
N/A
N/A
N/A
1/0
1/0
1/0
1/0
1/0
1/0
R
(7)
1
N/A
N/A
N/A
1/0
1/0
1/0
1/0
1/0
1/0
R
o
Read the contents of the Wiper Counter
Register pointed to by P
Write new value to the Wiper Counter
Register pointed to by P
Read the contents of the Register
pointed to by P
Write new value to the Register
pointed to by P
Transfer the contents of the Register
pointed to by P
to its associated WCR
Transfer the contents of the WCR
pointed to by P
pointed to by R
Transfer the contents of all four Data
Registers pointed to by R
respective WCR
Transfer the contents of all WCRs
to their respective data Registers
pointed to by R
Enable Increment/decrement of the
WCR pointed to by P
8
ACKNOWLEDGE
Operation
0
0
0
0
1
1
–R
–R
and R
and R
and R
to the Register
0
0
9
0
1
1
1
–R
–R
–R
0
0
3079 ILL F14
1
–R
0
0
0
0
3079 PGM T11.1
to their