EMC2101-R-ACZL-TR datasheet(25/56 Pages) MICROCHIP

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DS20006703A-page 25

EMC2101

5.4

Status Register

The Status Register is a read only register and returns

the operational status of the part.

If the ALERT/TACH pin is configured as an ALERT

output and any of these bits are set to '1' (except the

BUSY bit and the FAULT bit), then the ALERT/TACH

pin is asserted low (if interrupts are not masked (see

Section 5.5, Configuration Register).

Reading from the Status Register will cause the MASK

bit to be set if any bit (other than BUSY and FAULT)

have been set. Each bit is automatically cleared when

the error condition has been removed, however the

internal error condition flags may still be set. The ARA

command must be used to clear the ALERT/TACH pin

if there are no bits set in the Status Register. In addition,

reading from the Status Register will clear all bits. If the

error condition persists, then the bits will be reset at the

end of the next conversion.

When the device is configured in Comparison Mode

(see Section 5.23, Averaging Filter Register), reading

the Status Register will not clear any active status bits

(except EEPROM and FAULT). These bits are auto-

matically cleared when the error condition is removed.

STATUS REGISTER (ADDRESS 02h)

RRRRRR

BUSY

INT_ HIGH

EEPROM

EXT_HIGH

EXT_LOW

FAULT

TCRIT

TACH

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 is unknown

bit 7

BUSY: Indicates that the ADC is converting; does not trigger an interrupt.

bit 6

INT_ HIGH: Internal temperature has met or exceeded the high limit.

bit 5

EEPROM: Indicates that the EEPROM could not be found when the device powers up in the

Auto-Program Mode (see Section 4.1, Modes of Operation (EMC2101-R Only)). This bit only applies

to the EMC2102-R. It will always read ‘0’ for the EMC2101 device

bit 4

EXT_HIGH: External Diode temperature has exceeded the high limit.

bit 3

EXT_LOW: External Diode temperature has fallen below the low limit.

bit 2

FAULT: A diode fault has occurred on the External Diode.

bit 1

TCRIT: External Diode Temperature has met or exceeded the TCRIT limit.

bit 0

TACH: The TACH count has exceeded the TACH Limit.

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