AS5171 datasheet(28/42 Pages) AMSCO

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[v1-01] 2016-Feb-17

AS5171 − Application Information

Programming Parameter

The programming has to be performed in communication

mode. If the cust_lock=0, the sensor starts in communication

mode.

The following procedure and the block diagram are showing

the common 2 point calibration. For special calibration

procedure:

AS5171A: Analog output driver calibration

AS5171A/AS5171B: Linearization.

Please go in contact with the ams application team.

Burn and Verification of the OTP Memory

Power on cycle

Move magnet to the first mechanical start position

Reset the DSP. Writing 0x20 into Reg(0x0023)

Read out the measured angle from ANGLECORDIC

Moving of magnet to the second mechanical position

(stop position)

Read out the measured angle from ANGLECORDIC

Write T1,T2 and all other transfer parameter into the

DLL: Calculation of GAIN, Offset, BP, Clamping

Write reg(0x000A) to reg (0x001E) with the custom

settings and the calculated values from point 7. -->

AS5171 Settings

Read reg(0x000A) to reg (0x001E) ---> Read register

step 1

10. Comparison of AS5171 settings with content of read

11. If point 10 is correct: Decision: pass 2 function

(measurement verification) or programming.

Programming sequence starts with point 12.

12. Write reg(0x000A) to reg (0x001E) with the custom

settings and the calculated values from point 7 +

customer lock Bit. --> AS5171 Settings_Prog

13. Read reg(0x0000) to reg (0x001D) ---> Read register

step 2

14. Calculation of Signature Byte out of Read register step

2 content: Signature Byte

15. Write 8Bit Signature to reg(0x001E)

16. Write reg(0x000A) to reg (0x001E) with the custom

settings and the calculated values from point 7 +

customer lock Bit + Signature byte. --> AS5171

Settings_Prog_final

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