MCP9802 Microchip Technology Inc., MCP9802 Datasheet - Page 11

• Manufacturer Part Number: MCP9802
• Description: 2-wire High-accuracy Temperature Sensor
• Manufacturer: Microchip Technology Inc.

4.3.2
The MCP9800/1/2/3 has a 16-bit read/write Tempera-
ture Limit-Set register (T
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 4.3.4.3 “ALERT Out-
put Configuration”).
This register uses the nine Most Significant bits (MSb)
and all other bits are don’t cares.
The power-up default value of T
<0 1010 0000> in binary.
REGISTER 4-3:
 2004 Microchip Technology Inc.
Upper Half:
bit 15
Legend:
R = Readable bit
- n = Value at POR
R/W-0
Sign
TEMPERATURE LIMIT-SET
REGISTER (T
2
R/W-0
6
°C/bit
Lower Half:
bit 7
2
R/W-0
-1
TEMPERATURE LIMIT-SET REGISTER (T
°C/bit
SET
) which contains a 9-bit data
SET
2
R/W-0
5
°C/bit
)
SET
R-0
register is 80°C
W = Writable bit
‘1’ = Bit is set
0
2
R/W-0
4
°C/bit
R-0
0
2
R/W-0
3
°C/bit
R-0
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
0
2
R/W-0
2
°C/bit
SET
R-0
)
0
2
R/W-0
1
MCP9800/1/2/3
°C/bit
R-0
0
2
x = Bit is unknown
R/W-0
0
°C/bit
bit 8
R-0
0
DS21909B-page 11
R-0
0
bit 0