X9269 Datasheet, PDF (11/25 Pages) Xicor Inc. – Dual Digitally-Controlled Potentiometers

X9269
Figure 3. Two-Byte Instruction Sequence
SCL
SDA
0101
S ^{ID3 ID2 ID1 ID0} A3 A2 A1 A0 A I3 I2 I1 I0 RB RA 0 P0 A ^S
T
C
CT
A
R
T
Device ID
External
Address
K
Instruction
Opcode
KO
Register Pot/WCR ^P
Address Address
Figure 4. Three-Byte Instruction Sequence
SCL
SDA
0 101
S
T
ID3 ID2 ID1 ID0 A3
A
R Device ID
T
A2 A1 A0 ^{A I3}
C
External ^K
Address
I2 I1 I0
Instruction
Opcode
0
RB RA 0 P0 A
C
K
Register Pot/WCR
Address Address
D7 D6 D5 D4 D3 D2 D1 D0 A S
CT
WCR[7:0]
or
KO
P
Data Register D[7:0]
Figure 5. Increment/Decrement Instruction Sequence
SCL
SDA
0101
0
ID3 ID2 ID1 ID0
S
A3
A2 A1 A0
A ^I3
I2 I1 I0 RB RA 0 P0 _A
I
I
T
A Device ID
R
External
Address
C
CN N
K
Instruction Register Pot/WCR K C C
Opcode
Address Address
12
T
Figure 6. Increment/Decrement Timing Limits
INC/DEC
CMD
Issued
SCL
t_WRID
ID
NE
CC
n1
DS
ET
CO
nP
SDA
R_W
Voltage Out
REV 1.1.11 2/17/03
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Characteristics subject to change without notice. 11 of 25