TCN75AVOA datasheet(20/40 Pages) MICROCHIP

20 / 40 page

TCN75A

DS21935D-page 20

 2010 Microchip Technology Inc.

5.3.3

TEMPERATURE HYSTERESIS

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 TSET limit. Therefore, the data

represents a minimum temperature limit. If the ambient

temperature drifts below the specified limit, the

TCN75A

asserts

alert

output

(refer

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 THYST register is 75°C,

or <0100 1011 0>b in binary.

TEMPERATURE HYSTERESIS REGISTER (THYST) — ADDRESS <0000 0010>b

Upper Half:

R/W-0

R/W-1

R/W-0

R/W-1

R/W-0

R/W-1

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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