AS5013-IQFT-1000【PDF 24/32 页】IC ENCODER HALL SENSOR 16-QFN

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Sheet目录60

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www.ams.com/AS5013

Revision 1.11

24 - 32

AS5013

Datasheet - I睠 Registers

8.15 Registers Initialization

After Power Up, the following sequence must be performed:

1. VDD and VDDp Power up, and reached their nominal values (VDD>2.7V, VDDp>1.7V).

2. RESETn LOW during >100ns

3. Delay 1000祍

4. Loop check register [0Fh] until the value F0h or F1h is present (reset finished, registers to their default values)

5. Optional: Write value 86h into register [2Eh] ?Invert magnet polarity. See Control Register 2 (2Eh) on page 22.

6. Configure register [2Bh] ?Configure M_ctrl middle hall element control

7. Configure register [2Ch] ?Configure J_ctrl attenuation factor

8. Configure register [2Dh] ?Configure T_ctrl scaling factor

9. 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 Register 2 (2Eh). C5 will become positive.

8.16 Registers Table

The following registers / functions are accessible over the serial I睠 interface.

Table 6. Registers

Number

of bits

Access

Address

Format

Reset

Value

Bit

Description

IC Identification

ID Code

0Ch

<7:0>

8-bit Manufacture ID Code

ID Version

0Dh

<7:0> 8-bit Component ID Version

Silicon Revision

00h

<7:0> 8-bit Silicon Revision

Control_register_1

Idle

R/W

0Fh

<7>

1: Idle mode

0: Low Power mode

Low_power_timebase

R/W

0Fh

111b

<6:4>

Low Power readout time base register

INT_disable

R/W

0Fh

<3>

Disables the interrupt functionality.

1: Interrupt disabled

0: Interrupt enabled

INT_function

R/W

0Fh

<2>

Interrupt control register

0: interrupt goes low with every new calculated x/y

coordinates

1: interrupt pin goes low in when new x/y coordinates

are calculated and the magnet has exited the xp, xn,

yp, yn threshold values

soft_rst

R/W

0Fh

<1>

Soft Reset

0: Normal mode

1: all registers return to their respective reset value

data_valid

0Fh

<0> Data valid indicator

0: X/Y calculation ongoing

1: X/Y calculation finished, coordinates ready

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