MCP98242-BESLASHST datasheet(13/46 Pages) MICROCHIP

13 / 46 page

DS21996A-page 13

MCP98242

5.1.1

CAPABILITY REGISTER

This is a read-only register used to identify the

temperature sensor capability. In this case, the

MCP98242 is capable of providing temperature at

0.25°C resolution, measuring temperature below and

above 0°C, providing ±1°C and ±2°C accuracy over the

active and monitor temperature ranges (respectively)

and providing user-programmable temperature event

boundary trip limits. Register 5-2 describes the

Capability register. These functions are described in

further detail in the following sections.

CAPABILITY REGISTER (READ-ONLY)

→ ADDRESS ‘0000 0000’b

U-0

——

—

bit 15

bit 8

U-0

R-0

R-1

—

Resolution

Meas Range

Accuracy

Temp Alarm

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

bit 15-5

Unimplemented: Read as ‘0’

bit 4-3

Resolution:

00 = 0.5°C

01 = 0.25°C (power up default)

10 = 0.125°C

11 = 0.0625°C

These bits reflect the selected resolution (see Section 5.2.3.2 “Temperature Resolution”)

bit 2

Temperature Measurement Range (Meas. Range):

0 =TA = 0 (decimal) for temperature below 0°C

1 =

The part can measure temperature below 0°C (power up default)

bit 1

Accuracy:

0 =

Accuracy

→ ±2°C from +75°C to +95°C (Active Range) and ±3°C from +40°C to +125°C

(Monitor Range)

1 =

Accuracy

→ ±1°C from +75°C to +95°C (Active Range) and ±2°C from +40°C to +125°C

(Monitor Range)

bit 0

Temperature Alarm:

0 =

No defined function (This bit will never be cleared or set to ‘0’).

1 =

The part has temperature boundary trip limits (TUPPER/TLOWER/TCRIT registers) and a

temperautre event output (JC 42.4 required feature).

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