AS5601-ASOT datasheet(21/43 Pages) AMSCO

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ams Datasheet

Page 21

[v1-02] 2014-Oct-29

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AS5601 − Register Description

ANGLE/RAW ANGLE Register

The RAW ANGLE register contains the unmodified angle. The

zero adjusted and filtered output value is available in the ANGLE

STATUS Register

The STATUS register provides bits that indicate the current state

of the AS5601.

Figure 21:

STATUS Register

AGC Register

The AS5601 uses automatic gain control (AGC) in a closed loop

to compensate for variations of the magnetic field strength due

to changes of temperature, airgap between IC and magnet, and

magnet degradation. The AGC register indicates the gain. For

the most robust performance, the gain value should be in the

center of its range. The airgap of the physical system can be

adjusted to achieve this value.

MAGNITUDE Register

The MAGNITUDE register indicates the magnitude value of the

internal CORDIC output.

Non-Volatile Memory (OTP)

The non-volatile memory is used to permanently program the

configuration. To program the non-volatile memory, the I²C

interface is used. The programming can be either performed in

the 5V supply mode or in the 3.3V operation mode but using a

minimum supply voltage of 3.3V and a 10 μF capacitor at the

VDD3V3 pin to ground. This 10 μF capacitor is needed only

during the programming of the device. Two different

commands are used to permanently program the device:

Name

State When Bit is High

AGC minimum gain overflow, magnet too strong

AGC maximum gain overflow, magnet too weak

Magnet was detected

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