AS5046 Programmable 360° Magnetic Angle Encoder – Preliminary Data Sheet

Revision 1.1

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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

Offset Comp Finish

OCF

must be 1 for valid data

Status bit 2

SIU bit 12

CORDIC Over Flow

COF

must be 0; if this bit is set, the

angular data is invalid

Status bit 3

SIU bit 13

Lin Alarm

LIN

LINearity warning bit. Should be 0

for normal operation. Will be 1 when

the magnetic field is too high or too

low

Status bit 4

SIU bit 14

Mag Incr.

M_I

This bit is set temporarily when the

magnetic field increases, when the

magnet is pushed towards the IC

Status bit 5

SIU bit 15

Mag Decr.

M_D

This bit is set temporarily when the

magnetic field decreases, when the

magnet is pulled away from the IC

Status bit 6

SIU bit 16

Even Parity

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