MCP4441 datasheet(59/100 Pages) MICROCHIP

59 / 100 page

DS22265A-page 59

MCP444X/446X

FIGURE 6-11:

General Call Formats.

00 0

0 000

XXXX

XX0A P

General Call Address

Second Byte

“7-bit Command”

Reserved 7-bit Commands (By I2C Specification - Philips # 9398 393 40011, Ver. 2.1 January 2000)

‘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

MCP44XX 7-bit Commands

‘1000 01x’

b - Increment Wiper 0 Register.

‘1001 01x’

b - Increment Wiper 1 Register.

The Following is a Microchip Extension to this General Call Format

00 0

0 000

XXXX

AX d 0 A

General Call Address

Second Byte

“7-bit Command”

MCP44XX 7-bit Commands

‘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.

dddd

ddd A P

Third Byte

The Following is a “Hardware General Call” Format

00 0

S0 0 0 0

XXXX

XX1A

General Call Address

Second Byte

“7-bit Command”

XXXX

XXX AP

n occurrences of (Data + A)

This indicates a “Hardware General Call”

MCP44XX will ignore this byte and

all following bytes (and A), until

‘1000 10x’b - Decrement Wiper 0 Register.

‘1001 10x’

b - Decrement Wiper 1 Register.

‘1100 00d’

b - Write Next Byte (Third Byte) to TCON Register.

a Stop bit (P) is encountered.

“0” for General Call Command

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