cat5172 ON Semiconductor, cat5172 Datasheet - Page 5

• Manufacturer Part Number: cat5172
• Description: 256-position Spi Compatible Digital Potentiometer
• Manufacturer: ON Semiconductor

SPI Interface
V
OUT
CLK
SDI
CS
V1
V2
(DATA IN)
Figure 3. SPI Interface Detailed Timing Diagram (V
VOUT
Figure 2. CAT5172 SPI Interface Timing Diagram (V
t
SDI
CSHO
CLK
CS
V
V
W0
W
1
1
0
0
1
0
Table 6. CAT5172 SERIAL DATA−WORD FORMAT
MSB
B7
D7
2
t
CSS
7
Dx
D7 D6 D5 D4 D3 D2 D1 D0
1
B6
D6
t
CH
2
B5
D5
3
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DATA IN
t
4
DS
Dx
B4
D4
t
CL
5
5
B3
D3
6
7
B2
D2
t
DH
8
A
B1
D1
= 5 V, V
A
t
CSH1
= 5 V, V
t
CS1
LSB
t
B0
D0
S
2
B
0
B
= 0 V, V
t
= 0 V, V
CSW
±1 LSB
W
W
= V
= V
OUT
OUT
)
)