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[v2-06] 2014-Oct-14

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AS5050A − Error Monitoring

Error Status Register

Figure 32:

Error Status Register and Description

Bit

Type

Description

Error Status DSP

Reserved

FIELD_ALARM_LO

AGC level is equal or even higher than the maximum level. Magnetic field is

too weak.

FIELD_ALARM_HI

AGC level is equal or even lower than the minimum level. Magnetic field is too

strong.

RANGE

The RANGE flag signals that the Hall bias circuit has reached the head room

limit. This might occur at the combination of low supply voltage, high

temperature and low magnetic field. In this case, manually reducing the AGC

setting (Figure 28) can be used to recover a valid Hall biasing condition.

9CORDICOV

The CORDIC calculates the angle. An error occurs when the input signals of the

CORDIC are too large. The internal algorithm fails.

8ADCOV

The ADCOV bit occurs if the magnetic input field strength is too large for at

least one Hall element. This can be the case if the magnet is displaced. Second

reason could be that the offset compensation after power up is not finished

yet. If this happens some dummy READ ANGLE commands may be sent to

settle the offset loop.

Error Status System

7Reserved

6Reserved

5Reserved

4WOW

When a READ ANGLE command is in progress, the WOW flag is set to 1. At the

end of the measurement the WOW flag is cleared to 0. Only in case of

deadlock the WOW flag is stuck high; in which case a MASTER RESET must be

sent to clear the deadlock.

Error Status SPI

3Reserved

ADDMON

Set to high when non existing address is used.

CLKMON

Set to high when the amount of clock cycles is not correct.

0PARITY

Set to high when the transmitted parity bit does not match to calculated

parity bit.

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