Datasheet

© 2011 Microchip Technology Inc. DS25095A-page 27
MCP9808
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 MCP9808 is
0x0054 (hexadecimal).
FIGURE 5-6: Timing Diagram for Reading the Manufacturer ID Register (see Section 4.0 “Serial
Communication”).
REGISTER 5-5: MANUFACTURER ID REGISTER – READ-ONLY (→ ADDRESS ‘0000 0110’b)
R-0 R-0 R-0 R-0 R-0 R-0 R-0 R-0
Manufacturer ID
bit 15 bit 8
R-0 R-1 R-0 R-1 R-0 R-1 R-0 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
A
C
K
0011
A
Manufacturer ID Pointer
0000
A
C
K
S
2
A
1
A
0
12345678 12345678
SCL
0
Address Byte
A
C
K
0011
A
MSB Data
A
C
K
N
A
K
S P
2
A
1
A
0
12345678 12345678 12345678
Address Byte LSB Data
R
MCP9808 MCP9808
MCP9808
Master Master
W
SDA
SCL
110
00000
000 01010
100
Note: It is not necessary to
select the Register
Pointer if it was set
from the previous
read/write.