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AS5030

Datasheet - Application In formatio n

8.1 AS5030 Programming

The AS5030 has an integrated 18-Bit OTP ROM for configuration purposes.

8.1.1 OTP Programming Options

The OTP programming options can be set permanently by programming or temporarily by overwriting. Both methods are carried out over the

serial interface, but with different commands (WRITE OTP, PROG OTP).

Note:

During the 18bit OTP programming, each bit needs 4 clock pulses to be validated.



Zero Position Programming

This programming option allows the user to program any rotation angle of the magnet as the new zero position. This useful feature simpli-

fies the assembly process as the magnet does not need to be mechanically adjusted to the electrical zero position. It can be assembled in

any rotation angle and later matched to the mechanical zero position by zero position programming.



Magnetic Field Optimization

This programming option allows the user to match the vertical distance of the magnet with the optimum magnetic field range of the AS5030

by setting the sensitivity level.

8.1.2 Reduced Power Mode Programming Options

These temporary programming options are also carried out over the serial interface.



Low Power Mode

Low Power Mode is a power saving mode with fast start-up. In Low Power Mode, all internal digital registers are frozen and the power con-

sumption is reduced to max. 1.5mA. The serial interface remains active. Start-up from this mode to normal operation can be accomplished

within 150µs. This mode is recommended for applications, where low power, but fast start-up and short reading cycle intervals are required.



Ultra-low Power Mode

Ultra-low Power Mode is a power saving mode with even reduced power-down current consumption. In this mode, all chip functions are fro-

zen and the power consumption is reduced to max. 50µA. The serial interface remains active. Start-up from this mode to normal operation

can be accomplished within 500µs. This mode is recommended for applications, where very low average power consumption is required,

e.g. for battery operated equipment. For example, in a cycled operation with 10 readings per second, the average power consumption of the

AS5030 can be reduced to only 120µA.

8.2 AS5030 Read / Write Commands

Data transmission with the AS5030 is handled over the 2-wire or 3-wire interface. The transmission protocol begins with sending a 5-bit

command to the AS5030, followed by reading or writing 16 or 18 bits of data:

8.2.1 16-bit Read Command

C2

displays status of hardware pin C2 (pin #15)

Lock

indicates that the AGC is locked. Data is invalid when this bit is 0

AGC

6-bit AGC register. Indicates the strength of the magnet (e.g. for push-button applications)

ideally, the vertical distance of the magnet should be chosen such that the AGC value is in the middle (around 100000b)

Angle

8-bit Angle value; represents the rotation angle of the magnet. One step = 360°/256 = 1.4°

Command

Bin

Hex

D15

D14

D13 D12 D11 D10

D9

D8

D7

D6

D5

D4

D3

D2

D1

D0

RD

ANGLE

00000

00

C2

lock

AGC 5:0

Angle 7:0