MCP4431 Microchip Technology Inc., MCP4431 Datasheet - Page 53

• Manufacturer Part Number: MCP4431
• Description: 7/8-bit Volatile Quad Digital Pot With I 2c Interface
• Manufacturer: Microchip Technology Inc.

FIGURE 6-11:
 2010 Microchip Technology Inc.
S
S
S
Reserved 7-bit Commands (by I
MCP44XX 7-bit Commands
The Following is a Microchip Extension to this General Call Format
MCP44XX 7-bit Commands
The Following is a “Hardware General Call” Format
0 0 0
0 0 0
0 0 0
‘0000 011’b - Reset and write programmable part of slave address by hardware.
‘0000 010’b - Write programmable part of slave address by hardware.
‘0000 000’b - NOT Allowed
‘1000 01x’b - Increment Wiper 0 Register.
‘1001 01x’b - Increment Wiper 1 Register.
‘1000 10x’b - Decrement Wiper 0 Register.
‘1001 10x’b - Decrement Wiper 1 Register.
‘1000 00d’b - Write Next Byte (Third Byte) to Volatile Wiper 0 Register.
‘1001 00d’b - Write Next Byte (Third Byte) to Volatile Wiper 1 Register.
‘1100 00d’b - Write Next Byte (Third Byte) to TCON Register.
General Call Address
General Call Address
General Call Address
0
0
0
General Call Formats.
0 0 0 0
0 0 0 0
0 0 0 0
A
A
A
2
C Specification - NXP UM10204_3, Version 03 19, June 2007)
X X X X
X X X X
X X X X
“7-bit Command”
“7-bit Command”
“7-bit Command”
Second Byte
Second Byte
Second Byte
X
X
X
X X 0 A P
X d
X X 1 A
0 A
This indicates a “Hardware General Call”
MCP44XX will ignore this byte and
all following bytes (and A), until
a Stop bit (P) is encountered.
‘0’ for General Call Command
d
X X X X
n occurrences of (Data + A)
d
Third Byte
d
MCP443X/5X
d
d
X
d
X X X A P
d
DS22267A-page 53
d A P