MCP4531 Microchip Technology Inc., MCP4531 Datasheet - Page 59

• Manufacturer Part Number: MCP4531
• Description: 7/8-bit Single/dual I 2 C Digital Pot With Non-volatile Memory
• Manufacturer: Microchip Technology Inc.

FIGURE 7-2:
FIGURE 7-3:
© 2008 Microchip Technology Inc.
Note:
S
S
0 1 0
0 1 0
Fixed
Address
Fixed
Address
Only functions when writing the volatile wiper registers (AD3:AD0 = 00h, 01h, and 04h)
or the TCON register
Control Byte
Control Byte
AD AD AD AD
3
1
I
1
I
2
2
2
WRITE Command
C Write Sequence.
C Continuous Volatile Wiper Write.
A2 A1 A0 0
Variable
Address
A2 A1 A0 0
Variable
Address
1
0
AD AD AD AD
3
0
Write bit
2
Write bit
WRITE Command
0 x D8 A
1
A
A
AD AD AD AD
0
3
AD AD AD AD
3
Device
Memory
Address
Device
Memory
Address
0
2
WRITE Command
2
MCP454X/456X/464X/466X
WRITE Command
0 x D8 A
1
D7 D6 D5 D4
1
0
0
Write Data bits
Command
Command
0
0
0 x D8 A
0 x D8 A
D7 D6 D5 D4
D3
Write Data bits
D2 D1 D0 A
D7 D6 D5 D4
Write “Data” bits
D7 D6 D5 D4
Write “Data” bits
D3
Write Data bits
Write Data bits
D2 D1 D0 A P
STOP bit
D3
D3
D2 D1 D0 A P
D2 D1 D0 A
DS22107A-page 59