MCP9902 datasheet(24/50 Pages) MICROCHIP

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MCP9902/3/4

DS20005382C-page 24

 2015-2016 Microchip Technology Inc.

STATUS: STATUS REGISTER REPORTING STATE OF INTERNAL AND

EXTERNAL DIODES (ADDRESS 02H)

RC-0

BUSY

IHIGH

ILOW

EHIGH

ELOW

FAULT

ETHRM

ITHRM

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 in unknown

BUSY

: This bit indicates that the ADC is currently converting. This bit does not cause either the

ALERT/THERM2 or THERM pin to be asserted.

= ADC is currently converting

= ADC is not converting

IHIGH

: This bit indicates the Internal Diode channel exceeds its programmed high limit. When set, this

bit will assert the ALERT/THERM2 pin.

= Reported temperature above the high limit

= Reported temperature is not above the high limit

ILOW

: This bit indicates the Internal Diode channel drops below its programmed low limit. When set,

this bit will assert the ALERT/THERM2 pin.

= Reported temperature below the low limit

= Reported temperature is not below the low limit

EHIGH

: This bit indicates the External Diode channel exceeds its programmed high limit. When set,

this bit will assert the ALERT/THERM2 pin.

= Reported temperature above the high limit

= Reported temperature is not above the high limit

ELOW

: This bit indicates the External Diode channel drops below its programmed low limit. When set,

this bit will assert the ALERT/THERM2 pin.

= Reported temperature below the low limit

= Reported temperature is not below the low limit

FAULT

: This bit indicates when a diode fault is detected. When set, this bit will assert the

ALERT/THERM2 pin.

= Open circuit or short of a diode

= No fault reported

ETHRM

: This bit indicates the External Diode channel exceeds the programmed Therm Limit. When

set, this bit will assert the THERM pin. This bit will remain set until the THERM pin is released at which

point it will be automatically cleared.

= Reported temperature above the high limit

= Reported temperature is not above the high limit

ITHRM

: This bit is set when the Internal Diode channel exceeds the programmed Therm Limit. When

set, this bit will assert the THERM pin. This bit will remain set until the THERM pin is released at which

point it will be automatically cleared.

= Reported temperature above the high limit

= Reported temperature is not above the high limit

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