AS5046 Ver la hoja de datos (PDF) - austriamicrosystems AG

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AS5046

PROGRAMMABLE 12-bit 360° MAGNETIC ANGLE ENCODER WITH ABSOLUTE 2-WIRE SERIAL AND ANALOG INTERFACES

austriamicrosystems AG 

AS5046 Programmable 360° Magnetic Angle Encoder – Preliminary Data Sheet

Notes:

1) This address is also modified with the analog mode setting

2) Writing a value to any of the SIN- COS- registers halts the conversion loop and calculates an angle that is given by the

values in the SIN and COS registers. A Read command from these registers restarts the automatic conversion loop.

3) Writing a value to the AGC counter register halts the automatic gain control loop and sets the AGC to the value written

in this register. The angle conversion loop continues to operate. A Read command from the AGC register restarts the

automatic gain control loop.

9.1 Serial Interface Unit (Type ID: 0101)

The Serial Interface Unit contains 32 bits of data:

Note that the angle information is only valid, if the Hall Sensor Front-end is configured properly. See Table 4 for more

information.

9.1.1 12-bit Angle Information

the 12-bit angle data consists of two blocks: the upper 10-bits in bytes 1 & 2 and the lower two bits in byte 4

9.1.2 6-bit Status Information

Status bit 1

SIU bit 11

Status bit 2

SIU bit 12

Status bit 3

SIU bit 13

Status bit 4

SIU bit 14

Status bit 5

Status bit 6

SIU bit 15

SIU bit 16

Offset Comp Finish

CORDIC Over Flow

Lin Alarm

Mag Incr.

Mag Decr.

Even Parity

OCF must be 1 for valid data

must be 0; if this bit is set, the

COF

angular data is invalid

LINearity warning bit. Should be 0

for normal operation. Will be 1 when

LIN

the magnetic field is too high or too

low

This bit is set temporarily when the

M_I

magnetic field increases, when the

magnet is pushed towards the IC

This bit is set temporarily when the

M_D magnetic field decreases, when the

magnet is pulled away from the IC

P

Even parity check bit of bytes 1 & 2

Table 3: Status bits of byte 2 of the SIU

9.1.3 8-bit Magnitude Information

The magnitude information is a value that is proportional to the magnetic field strength. A strong magnet (or close distance

between magnet and chip) will result in a high magnitude value and vice versa. When the automatic gain control (AGC) is

active (default state), it tries to keep the magnitude value stable at a value of 3FH.

Revision 1.1

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