X9279 Xicor, X9279 Datasheet - Page 8

• Manufacturer Part Number: X9279
• Description: Single Digitally-Controlled (XDCP) Potentiometer
• Manufacturer: Xicor

X9279
Register Selection (R0 to R3) Table
Table 1. Identification Byte Format
Table 2. Instruction Byte Format
REV 1.1.7 2/6/03
RB RA
0
0
1
1
(MSB)
(MSB)
ID3
I3
0
0
1
0
1
Instruction Opcode
Selection
Register
ID2
I2
1
Device Type
Identifier
0
1
2
3
ID1
I1
0
Data Register Read and Write;
Wiper Counter Register
Operations
Data Register Read and Write;
Wiper Counter Register
Operations
Data Register Read and Write;
Wiper Counter Register
Operations
Data Register Read and Write;
Wiper Counter Register
Operations
ID0
I0
1
Operations
for proper operation
Set to 0
RB
0
Selection
Register
RA
A2
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Pot Selection (Bank Selection)
Set to P0=0 for potentiometer operations
Internal Slave
P1 and P0 are used also for register Bank Selection
for 2-Wire Register Write and Read operations
Address
P1
A1
Register Bank Selection (Bank 0 to Bank 3) Table
P1
0
0
1
1
(LSB)
(LSB)
P0
A0
P0
0
1
0
1
Selection
Bank
0
1
2
3
Characteristics subject to change without notice.
Data Register Read and Write;
Wiper Counter Register
Operations
Data Register Read and Write
Only
Data Register Read and Write
Only
Data Register Read and Write
Only
Register Selection
Register Selected
DR0
DR1
DR2
DR3
Operations
RB
0
0
1
1
RA
8 of 24
0
1
0
1