MCP9804 datasheet(27/54 Pages) MICROCHIP

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DS22203A-page 27

MCP9804

5.1.4

MANUFACTURER ID REGISTER

This register is used to identify the manufacturer of the

device in order to perform manufacturer specific

operation. The Manufacturer ID for the MCP9804 is

0x0054 (hexadecimal).

FIGURE 5-7:

Timing Diagram for Reading the Manufacturer ID Register (See Section 4.0).

MANUFACTURER ID REGISTER (READ-ONLY)

→ ADDRESS ‘0000 0110’b

R-0

Manufacturer ID

bit 15

bit 8

R-0

R-1

R-0

R-1

R-0

R-1

R-0

Manufacturer ID

bit 7

bit 0

Legend:

R = Readable bit

W = Writable bit

U = Unimplemented bit, read as ‘0’

-n = Value at POR

‘1’ = Bit is set

‘0’ = Bit is cleared

x = Bit is unknown

bit 15-0

Device Manufacturer Identification Bits

SDA

Manuf. ID Pointer

678

SCL

Address Byte

MSB Data

345

567

Address Byte

LSB Data

MCP9804

Master

SDA

SCL

Note:

It is not necessary to

select

the

pointer if it was set from

the previous read/write.

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