MCP9902/3/4
DS20005382C-page 24 2015-2016 Microchip Technology Inc.
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 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
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
ALER
T/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