CAT5419_13 Datasheet, PDF (11/15 Pages) ON Semiconductor – Dual Digital Potentiometer (POT)

CAT5419
SDA
0101
S ^{ID3 ID2 ID1 ID0} A3 A2 A1 A0 A I3 I2 I1 I0 R1 R0 0 P0 A ^S
T
C
CT
A
R Device ID
T
Internal
Address
K
Instruction
KO
Register Pot/WCR P
Opcode _{Address Address}
Figure 10. Two-byte Instruction Sequence
SDA
0 101
S
T
ID3 ID2 ID1 ID0 _{A3 A2 A1}
A0
A
C
I3
I2 I1 I0
R1 R0
0
P0
A
C
D7 D6 D5 D4
D3 D2 D1 D0
A
R
Device ID
T
Internal
Address
K
K
Instruction
Opcode
Data Pot/WCR
Register Address
Address
WCR[7:0]
or
Data Register D[7:0]
AS
CT
KO
P
Figure 11. Three-byte Instruction Sequence
SDA
0101
S ^{ID3 ID2 ID1 ID0 A3 A2 A1 A0}
T
A Device ID
R
Internal
Address
T
A
C
K
I3 I2 I1 I0
Instruction
Opcode
R1 R0 0 P0 A
C
Data ^{Pot/WCR K}
Register ^Address
Address
I
N
C
1
I
N
C
2
Figure 12. Increment/Decrement Instruction Sequence
ID
NE
CC
n1
DS
ET
CO
nP
INC/DEC
Command
Issued
SCL
SDA
R_W
t_WRID
Voltage Out
Figure 13. Increment/Decrement Timing Limits
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