AS5013 datasheet(34/50 Pages) AMSCO

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[v2-00] 2021-Apr-19

AS5013 − I²C Registers

Figure 38:

Power-Up Sequence

Registers Initialization

After Power Up, the following sequence must be performed:

VDD and VDDp Power up, and reached their nominal

values (VDD>2.7V, VDDp>1.7V).

RESETn LOW during >100ns

Delay 1000μs

Loop check register [0Fh] until the value F0h or F1h is

present (reset finished, registers to their default values)

Optional: Write value 86h into register [2Eh]

→ Invert

magnet polarity. See Control Register 2 (2Eh) on page

22.

Configure register [2Bh]

→ Configure M_ctrl middle Hall

element control

Configure register [2Ch]

→ Configure J_ctrl attenuation

factor

Configure register [2Dh]

→ Configure T_ctrl scaling

factor

Configure the wanted Power Mode into register [0Fh]

(Idle mode or Low Power Mode with Timebase

configuration)

10. X Y coordinates are ready to be read.

Note: In order to detect if the magnet polarity is correct, read

the C5 middle Hall element when the magnet is centered.

C5 = (C5_pos – C5_neg) / 2

With: C5_pos = (c5_pos[11:8] << 8) | c5_pos[7:0]

C5_neg = (c5_neg[11:8] << 8) | c5_neg[7:0]

C5 must always be positive.

If C5 is negative, then invert the bit inv_spinning in the Control

External RESETn pin, and without Power on Reset (POR)

2.7V

VDDp

(>1.7V)

VDD

RESETn

>100ns

>1000us

Power on Reset (POR) only

0.2V

VDD

>1000us

Power up phase

VDD @ t=0 between

0V and 0.2V

2.7V

Power up phase

VDD @ t=0 between 0V

and 2.7V

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