Datasheet

© 2009 Microchip Technology Inc. DS22153C-page 29
MCP9843/98243
5.1.5 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 MCP9843/
98243 is 0x0054 (hexadecimal).
FIGURE 5-8: Timing Diagram for Reading the Manufacturer ID Register (See Section 4.0 “Serial
Communication”).
REGISTER 5-6: 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 Number
.
SDA
A
C
K
0011
A
Manuf. 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
MCP9843/98243
MCP9843/98243
MCP9843/98243
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.