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MCP9800/1/2/3
5.3.4
TEMPERATURE LIMIT-SET
REGISTER (T SET )
The MCP9800/1/2/3 has a 16-bit read/write
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
Section 5.3.4.3 “ALERT Output Configuration” ).
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 SET register is
80°C, or <0101 0000 0>b in binary.
REGISTER 5-5:
Upper Half:
TEMPERATURE LIMIT-SET REGISTER (T SET ) – ADDRESS < 0000 0011 >b
R/W-0
Sign
R/W-1
2 6 °C
R/W-0
2 5 °C
R/W-1
2 4 °C
R/W-0
2 3 °C
R/W-0
2 2 °C
R/W-0
2 1 °C
R/W-0
2 0 °C
bit 15
Lower Half:
bit 8
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
Legend:
bit 0
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
DS21909D-page 22
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
? 2010 Microchip Technology Inc.
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