Microchip Technology MCP9800DM-DL2 Data Sheet
MCP9800/1/2/3
DS21909D-page 22
2010 Microchip Technology Inc.
5.3.4
TEMPERATURE LIMIT-SET
REGISTER (T
REGISTER (T
SET
)
The MCP9800/1/2/3 has a 16-bit read/write
Temperature Limit-Set register (T
Temperature Limit-Set register (T
SET
) which contains a
9-bit data in two’s compliment format. This data
represents a maximum temperature limit. If the ambient
temperature exceeds this specified limit, the
MCP9800/1/2/3 asserts an alert output. (Refer to
represents a maximum temperature limit. If the ambient
temperature exceeds this specified limit, the
MCP9800/1/2/3 asserts an alert output. (Refer to
This register uses the nine Most Significant bits (MSbs)
and all other bits are “don’t cares”.
The power-up default value of the T
and all other bits are “don’t cares”.
The power-up default value of the T
SET
register is
80°C, or <0101 0000 0>b in binary.
REGISTER 5-5:
TEMPERATURE LIMIT-SET REGISTER (T
SET
) – ADDRESS <
0000 0011
>b
Upper Half:
R/W-0
R/W-1
R/W-0
R/W-1
R/W-0
R/W-0
R/W-0
R/W-0
Sign
2
6
°C
2
5
°C
2
4
°C
2
3
°C
2
2
°C
2
1
°C
2
0
°C
bit 15
bit 8
Lower Half:
R/W-0
R-0
R-0
R-0
R-0
R-0
R-0
R-0
2
-1
°C
0
0
0
0
0
0
0
bit 7
bit 0
Legend:
R = Readable bit
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