TCN75AVOA datasheet(22/40 Pages) MICROCHIP

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TCN75A

DS21935D-page 22

 2010 Microchip Technology Inc.

5.3.4

TEMPERATURE LIMIT-SET

The TCN75A has a 16-bit read/write Temperature

Limit-Set register (TSET) 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 TCN75A 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 TSET register is

80°C, or <0101 0000 0>b in binary.

TEMPERATURE LIMIT-SET REGISTER (TSET) — ADDRESS <0000 0011>b

Upper Half:

R/W-0

R/W-1

R/W-0

R/W-1

R/W-0

Sign

26 °C

25 °C

24 °C

23 °C

22 °C

21 °C

20 °C

bit 15

bit 8

Lower Half:

R/W-0

R-0

2-1 °C

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

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