EMC2301 datasheet(32/70 Pages) MICROCHIP

32 / 70 page

EMC2301/2/3/5

DS20006532A-page 32

 2021 Microchip Technology Inc.

6.6

Fan Drive Fail Status Register

The Fan Drive Fail Status register indicates which fan

driver cannot drive to the programmed speed even at

100% duty cycle (see Section 4.4.4 “Aging Fan or

Invalid Drive Detection” and Register 6-16). All bits

are cleared upon a read if the Error condition has been

removed.

DRIVE FAIL STATUS - FAN DRIVE FAIL STATUS REGISTER (ADDRESS 27H)

U-0

RC-0

—

DRVF5

DRVF4

DRVF3

DRVF2

DRVF1

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 is unknown

bit 7-5

Unimplemented bits, read as ‘0’.

bit 4

DRVF5: Drive Fail Fan 5 Status

1 = Fan 5 is unable to reach the commanded RPM with 100% PWM input.

0 = Fan 5 is within limits of commanded RPM.

bit 3

DRVF4: Drive Fail Fan 4 Status

1 = Fan 4 is unable to reach the commanded RPM with 100% PWM input.

0 = Fan 4 is within limits of commanded RPM.

bit 2

DRVF3: Drive Fail Fan 3 Status

1 = Fan 3 is unable to reach the commanded RPM with 100% PWM input.

0 = Fan 3 is within limits of commanded RPM.

bit 1

DRVF2: Drive Fail Fan 2 Status

1 = Fan 2 is unable to reach the commanded RPM with 100% PWM input.

0 = Fan 2 is within limits of commanded RPM.

bit 0

DRVF1: Drive Fail Fan 1 Status

1 = Fan 1 is unable to reach the commanded RPM with 100% PWM input.

0 = Fan 1 is within limits of commanded RPM.

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