MCP9803-MSLASHMSG datasheet(22/30 Pages) MICROCHIP

22 / 30 page

MCP9800/1/2/3

DS21909C-page 22

 2010 Microchip Technology Inc.

5.3.4

TEMPERATURE LIMIT-SET

The

MCP9800/1/2/3

has

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

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 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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