MCP9902 datasheet(36/50 Pages) MICROCHIP

36 / 50 page

MCP9902/3/4

DS20005382C-page 36

 2015-2016 Microchip Technology Inc.

The Therm Limit Status Register contains the status

bits that are set when a temperature channel Therm

Limit is exceeded. If any of these bits are set, the

THERM status bit in the Status register is set. Reading

from the Therm Limit Status register will not clear the

status bits. Once the temperature drops below the

Therm Limit minus the Therm Hysteresis, the corre-

sponding status bits will be automatically cleared. The

THERM bit in the Status register will be cleared when

all individual channel THERM bits are cleared.

THRM LIM STS – HIGH LIMIT STATUS REGISTER (ADDRESS 37H)

U-0

RC-0

—

E3THERM

E2THERM

E1THERM

ITHERM

bit 7

bit 0

Legend:

RC = Read-then-clear 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

7-4

Unimplemented

: Read as ‘0’

E3THERM

: This bit is set when the External Diode 3 channel exceeds its programmed Therm Limit.

When set, this bit will assert the THERM pin.

= THERM pin asserted

= THERM pin not asserted

E2THERM

: This bit is set when the External Diode 2 channel exceeds its programmed Therm Limit.

When set, this bit will assert the THERM pin.

= THERM pin asserted

= THERM pin not asserted

E1THERM

: This bit is set when the External Diode 1 channel exceeds its programmed Therm Limit.

When set, this bit will assert the THERM pin.

= THERM pin asserted

= THERM pin not asserted

ITHERM

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

set, this bit will assert the THERM pin.

= THERM pin asserted

= THERM pin not asserted

FLTR SEL: FILTER SELECTION REGISTER (ADDRESS 40H)

U-0

RC-0

—

—FLTER<1:0>

bit 7

bit 0

Legend:

RC = Read-then-clear 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

7-2

Unimplemented

: Read as ‘0’

1-0

FILTER

: Control the level of digital filtering that is applied to the External Diode temperature measure-

ment as shown in Table 4-6

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