tcn75a Microchip Technology Inc., tcn75a Datasheet - Page 17

• Manufacturer Part Number: tcn75a
• Description: 2-wire Serial Temperature Sensor
• Manufacturer: Microchip Technology Inc.

5.3.3
The TCN75A has a 16-bit read/write Temperature
Hysteresis register that contains a 9-bit data in two’s
compliment format. This register is used to set a
hysteresis for the T
represents a minimum temperature limit. If the ambient
temperature drifts below the specified limit, the
TCN75A
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 T
or <0100 1011 0>b in binary.
REGISTER 5-4:
© 2006 Microchip Technology Inc.
bit 15
bit 7
Legend:
R = Readable bit
-n = Value at POR
Upper Half:
Lower Half:
R/W-0
R/W-0
2
Sign
-1
°C
asserts
TEMPERATURE HYSTERESIS
REGISTER (T
R/W-1
2
R-0
6
SET
an
0
TEMPERATURE HYSTERESIS REGISTER (T
°C
limit. Therefore, the data
alert
HYST
W = Writable bit
‘1’ = Bit is set
HYST
)
R/W-0
output
2
R-0
5
0
register is 75°C,
°C
(refer
R/W-0
2
R-0
4
0
°C
to
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
R/W-1
2
R-0
3
0
°C
HYST
R/W-0
2
R-0
2
) - ADDRESS <
0
°C
x = Bit is unknown
R/W-1
2
R-0
1
0
°C
TCN75A
0000 0010
DS21935C-page 17
R/W-1
2
R-0
0
>b
0
°C
bit 8
bit 0