MCP9902 Datasheet, PDF (24/50 Pages) Microchip Technology – Multi-Channel Low-Temperature Remote Diode Sensor

MCP9902/3/4
REGISTER 5-5: STATUS: STATUS REGISTER REPORTING STATE OF INTERNAL AND
EXTERNAL DIODES (ADDRESS 02H)
RC-0
RC-0
RC-0
RC-0
RC-0
RC-0
RC-0
RC-0
BUSY
IHIGH
ILOW
EHIGH
ELOW
FAULT
ETHRM
ITHRM
bit 7
bit 0
Legend:
R = Readable bit
-n = Value at POR
W = Writable bit
‘1’ = bit is set
U = Unimplemented bit, read as 0
‘0’ = Bit is cleared
x = Bit in unknown
7
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.
1 = ADC is currently converting
0 = ADC is not converting
6
IHIGH: This bit indicates the Internal Diode channel exceeds its programmed high limit. When set, this
bit will assert the ALERT/THERM2 pin.
1 = Reported temperature above the high limit
0 = Reported temperature is not above the high limit
5
ILOW: This bit indicates the Internal Diode channel drops below its programmed low limit. When set,
this bit will assert the ALERT/THERM2 pin.
1 = Reported temperature below the low limit
0 = Reported temperature is not below the low limit
4
EHIGH: This bit indicates the External Diode channel exceeds its programmed high limit. When set,
this bit will assert the ALERT/THERM2 pin.
1 = Reported temperature above the high limit
0 = Reported temperature is not above the high limit
3
ELOW: This bit indicates the External Diode channel drops below its programmed low limit. When set,
this bit will assert the ALERT/THERM2 pin.
1 = Reported temperature below the low limit
0 = Reported temperature is not below the low limit
2
FAULT: This bit indicates when a diode fault is detected. When set, this bit will assert the
ALERT/THERM2 pin.
1 = Open circuit or short of a diode
0 = No fault reported
1
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.
1 = Reported temperature above the high limit
0 = Reported temperature is not above the high limit
0
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.
1 = Reported temperature above the high limit
0 = Reported temperature is not above the high limit
DS20005382C-page 24
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