Datasheet

MAX5494–MAX5499
10-Bit, Dual, Nonvolatile, Linear-Taper
Digital Potentiometers
14 ______________________________________________________________________________________
1 2 3 4 5 6 7 8 9
10
D9 D8 D7 D6 D5 D4 D3 D2
a) 24-BIT COMMAND/DATA WORD
1 2 3 4 5 6 7 8
C1 C0
b) 8-BIT COMMAND WORD
D1 D0
SCLK
SCLK
DIN
DIN
CS
11 12
13 14 15 16
17
18 19 20 21 22
23 24
CS
C1 C0
RA0RA1
RA0RA1
Figure 7. SPI-Compatible Serial-Interface Format
Table 2. Register Map*
CLOCK EDGE 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 … 24
Bit Name — — C1 C0 — — RA1 RA0 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 — —
Write Wiper Register 1 0 0 0 0 0 0 0 1 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 — —
Write Wiper Register 2 0 0 0 0 0 0 1 0 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 — —
Write NV Register 1 0 0 0 1 0 0 0 1 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 — —
Write NV Register 2 0 0 0 1 0 0 1 0 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 — —
Copy Wiper Register 1
to NV Register 1
0 0 1 0 0 0 0 1 ————————————
Copy Wiper Register 2
to NV Register 2
0 0 1 0 0 0 1 0 ————————————
Copy Wiper Register 1
to NV Register 1 and
Copy Wiper Register 2
to NV Register 2
Simultaneously
0 0 1 0 0 0 1 1 ————————————
Copy NV Register 1 to
Wiper Register 1
0 0 1 1 0 0 0 1 ————————————
Copy NV Register 2 to
Wiper Register 2
0 0 1 1 0 0 1 0 ————————————
Copy NV Register 1 to
Wiper Register 1 and
Copy NV Register 2 to
Wiper Register 2
Simultaneously
0 0 1 1 0 0 1 1 ————————————
* D9 is the MSB and D0 is the LSB of the data bits.