Rainbow Electronics MAX5484 User Manual

Page 15

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MAX5481–MAX5484

10-Bit, Nonvolatile, Linear-Taper Digital

Potentiometers

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15

Figure 4. Serial SPI-Compatible Interface Format

ACTION

WIPER

REGISTER

UPDATED

0

0

0

0

0

0

0

0

D9 D8 D7 D6

D5 D4 D3 D2

D1 D0

1

2

3

4

5

6

7

8

9

10

11 12 13

14

15

16

17

18

19 20 21 22

23

24

X

X

X

X

X

X

CS

C1 C0

SCLK(

INC)

DIN(U/

D)

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

CS

11

12

13

14

15

16

17

18

19

20

21

22

23

24

CS

C1 C0

SCLK(

INC)

DIN(U/

D)

DIN(U/

D)

SCLK(

INC)

Figure 5. Write Wiper Register Operation