X9268_06 Datasheet, PDF (12/22 Pages) Intersil Corporation – Dual Digitally-Controlled Potentiometers

Figure 3. Two-Byte Instruction Sequence
X9268
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
Internal
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
Internal
Address
A I3
C
K
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]
KO
P
or
Data Register D[7:0]
Figure 5. Increment/Decrement Instruction Sequence
SCL
SDA
0101
0
S ^{ID3 ID2 ID1 ID0 A3 A2 A1 A0} A ^{I3 I2 I1 I0 RB RA 0 P0} A I I
T
C
CN N
A Device ID
Internal
K
Instruction
Register Pot/WCR K C C
R
Address
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
12
FN8172.4
August 29, 2006