X9271 Xicor, X9271 Datasheet - Page 9

• Manufacturer Part Number: X9271
• Description: Single Digitally-Controlled (XDCP) Potentiometer
• Manufacturer: Xicor

X9271
Figure 2. Two-Byte Instruction Sequence
Figure 3. Three-Byte Instruction Sequence (Write)
Figure 4. Three-Byte Instruction Sequence (Read)
REV 1.1.7 2/6/03
SCL
CS
SI
S0
SCL
SI
CS
ID3 ID2 ID1 ID0
ID3 ID2 ID1 ID0
0
SCK
CS
SI
0
Device ID
1
Device ID
1
0
0
1
ID3 ID2 ID1 ID0
1
0
0
0
0
0
Device ID
1
0
0
0
0
Internal
Address
0
A1 A0
Internal
Address
A1 A0
1
0
0
I3
0
0
I3
Instruction
Opcode
I2
A1 A0
Internal
Address
Instruction
Opcode
I2
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I1
I1 I0
I0
I3
RB RA
Register
Address
Instruction
Opcode
RB RA
Register
Address
I2
I1
P1
Pot/Bank
Address
P1
I0
P0
Pot/Bank
Address
P0
Data Register Bit [7:0] for all values of P1 and P0
Register
Address
Data Register Bit [7:0] for all values of P1 and P0
RB RA
These commands only valid when P1=P0=0
WCR[7:0] valid only when P1=P0=0;
D7 D6 D5 D4 D3 D2 D1 D0
D7 D6 D5 D4 D3 D2 D1 D0
WCR[7:0] valid only when P1=P0=0;
Characteristics subject to change without notice.
X
P1
0
Pot/Bank
X
Address
P0
0
X
Don’t Care
X
or
or
X
X
X
X
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