X9279 Datasheet, PDF (11/22 Pages) Xicor Inc. – Single Digitally-Controlled (XDCP) Potentiometer

Figure 4. Three-Byte Instruction Sequence
X9279
SCL
SDA
0 1 0 10
S ID3 ID2 ID1 ID0 0 _{A2 A1 A0} A I3 _I2 I1 _I0 RB RA P1 P0 A D7 D6 D5 D4 D3 D2 D1 D0 A S
T
C
C
CT
A
R Device ID
External ^K
Instruction
Register ^Pot/BankK
WCR[7:0] valid only when P1=P0=0; ^K
O
P
T
Address
Opcode
Address ^Address
or
Data Register D[7:0] for all values of P1 and P0
Figure 5. Increment/Decrement Instruction Squence
SCL
SDA
0101 0
S ^{ID3 ID2 ID1 ID0 0 A2 A1 A0}
T
A Device ID
External
R
Address
A ^{I3 I2 I1 I0}
C
K
Instruction
Opcode
RB RA P1 P0 A I
CN
Register Pot/BankK
C
1
Address Address
I
N
C
2
T
ID
NE
CC
n1
DS
ET
CO
nP
Figure 6. Increment/Decrement Timing Limits
INC/DEC
CMD
Issued
SCL
t_WRID
SDA
V_W/R_W
Voltage Out
11
FN8175.2
September 27, 2005