CAT5172(2009) 查看數據表（PDF） - ON Semiconductor

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CAT5172
(Rev.:2009)

256-Position SPI Compatible Digital Potentiometer

ON Semiconductor 

SPI Interface

CAT5172

Table 6. CAT5172 SERIAL DATA−WORD FORMAT

B7 B6 B5 B4 B3 B2 B1 B0

D7 D6 D5 D4 D3 D2 D1 D0

MSB

LSB

27

20

CS

CLK

SDI

V1

VOUT

V2

1 234 5 678

DATA IN

D7 D6 D5 D4 D3 D2 D1 D0

Figure 2. CAT5172 SPI Interface Timing Diagram (VA = 5 V, VB = 0 V, VW = VOUT)

1

SDI

(DATA IN) 0

1

CLK

0

tCSHO

1

CS

0

VW

VOUT

VW0

Dx

tCH

Dx

tDS

tCL

tCSS

tDH

tCS1

tCSH1

tCSW

tS

±1 LSB

Figure 3. SPI Interface Detailed Timing Diagram (VA = 5 V, VB = 0 V, VW = VOUT)

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