AS5600-ASOM datasheet(20/42 Pages) AMSCO

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[v1-00] 2014-Aug-11

AS5600 − Detailed Description

STATUS Register

The STATUS register provides bits that indicate the current state

of the AS5600.

Figure 23:

STATUS Register

AGC Register

The AS5600 uses Automatic Gain Control 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.

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 (Option A, Option C). Alternatively, start and

stop positions can be programmed through the output pin

(Option B). 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:

Burn_Angle Command (ZPOS, MPOS)

The host microcontroller can perform a permanent

programming of ZPOS and MPOS with a BURN_ANGLE

command. To perform a BURN_ANGLE command, write the

value 0x80 into register 0xFF. The BURN_ANGLE command can

be executed up to 3 times. ZMCO shows how many times ZPOS

and MPOS have been permanently written.

This command may only be executed if the presence of the

magnet is detected (MD = 1).

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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