CAT5251 Datasheet, PDF (10/15 Pages) Catalyst Semiconductor – Quad Digitally Programmable Potentiometer (DPP) with 256 Taps and SPI Interface

CAT5251
Figure 10. Increment/Decrement Timing Limits
INC/DEC
Command
Issued
SCK
t_WRL
SI
R_W
Voltage Out
INSTRUCTION FORMAT
Read Wiper Control Register (WCR)
DEVICE ADDRESSES
INSTRUCTION
DATA
¯C¯S¯ ^{0 1 0 1 0 0 A A 1 0 0 1 0 0 P P 7 6 5 4 3 2 1 0} ¯C¯S¯
10
10
Write Wiper Control Register (WCR)
DEVICE ADDRESSES
INSTRUCTION
DATA
¯C¯S¯ ^{0 1 0 1 0 0 A A 1 0 1 0 0 0 P P 7 6 5 4 3 2 1 0} ¯C¯S¯
10
10
Read Data Register (DR)
DEVICE ADDRESSES
¯C¯S¯ ^{0 1 0 1 0 0 A A}
10
INSTRUCTION
1011 R R P
101
DATA
P 7 6 5 4 3 2 1 0 _{¯C¯S¯}
0
Write Data Register (DR)
DEVICE ADDRESSES
INSTRUCTION
DATA
¯C¯S¯
0
1
0
1
0
0
A
1
A
0
1
1
0
0
RRP
101
P
0
7
6
5
4
3
2
1
0 _{¯C¯S¯}
High Voltage
Write Cycle
Read Status (WIP)
DEVICE ADDRESSES
¯C¯S¯ ^{0 1 0 1 0 0 A A}
10
INSTRUCTION
DATA
0 1 0 1 0 0 0 1 7 6 5 4 3 2 1 W _{¯C¯S¯}
0000000 I
P
Doc. No. MD-2017 Rev. H
10
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Characteristics subject to change without notice