MCP9805T-BESLASHST datasheet(15/34 Pages) MICROCHIP

15 / 34 page

DS21977B-page 15

MCP9805

bit 11-2

Ambient Temperature (TA) bits:

10-bit Ambient Temperature data in two’s compliment format.

bit 1, 0

Unimplemented: Read as ‘0’ (Note 2)

AMBIENT TEMPERATURE REGISTER (TA) → ADDRESS ‘0000 0101’b

(CONTINUED)

Note 1: Not affected by the status of the Event output configuration (bits 5 to 0 of CONFIG) and THYST = 0°C,

2: Bit 1 may remain set ‘1’ for some devices indicating 2-3 °C/LSb or 0.125°C temperature resolution,

depending on the state of the device calibration code.

Upper-Half:

R-0

TA Vs. TCRIT

TA Vs. TUPPER TA Vs. TLOWER

SIGN

27 °C/LSb

26 °C/LSb 25 °C/LSb

24 °C/LSb

bit 15

bit 8

Lower-Half:

R-0

U-0

23 °C/LSb

22 °C/LSb

21 °C/LSb

20 °C/LSb

2-1 °C/LSb 2-2 °C/LSb

—(2)

—

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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