AS5047D datasheet(25/37 Pages) AMSCO

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ams Datasheet: 2014-Jun-27 [v1-02]

AS5047D – 25

Appl icatio n I n f o rm a t i o n

Burn and Verification of the OTP Memory

Step-by-step procedure to permanently program the

non-volatile memory (OTP):

The programming can either be performed in 5V operation

using the internal LDO (1uF on regulator output pin), or in 3V

Operation but using a supply voltage between 3.3V and 3.5V.

Power on cycle

Write the SETTINGS1 and SETTINGS2 registerswith the

Custom settings for this application (Bit0 of Settings1 is

a factory bit. For programming its mandatory to set this

bit to 0).

Position the magnet at the desired zero position

Read out the measured angle from the ANGLE register

Write ANGLE [5:0] into the ZPOSL register and ANGLE

[13:6] into the ZPOSM register

Read reg(0x0016) to reg(0x0019)

→ Read register step1

Comparison of written content (settings and angle) with

content of read register step1 (Removing of Bit0 of

Settings1 from the comparison is mandatory. Bit0 is

preprogrammed)

If point 7 is correct, enable OTP read / write by setting

PROGEN = 1 in the PROG register

Start the OTP burn procedure by setting PROGOTP = 1

in the PROG register

10. Read the PROG register until it reads 0x0000

(Programming procedure complete)

11. Clear the memory content writing 0x00 in the whole

non-volatile memory

12. Enable OTP read / write by setting PROGEN = 1 in the

PROG register

13. Set the PROGVER = 1 to set the Guard band for the guard

band test(1).

14. Refresh the non-volatile memory content with the OTP

content by setting OTPREF = 1

15. Read reg(0x0016) to reg(0x0019)

→ Read register step2

16. Comparison of written content (settings and angle) with

content of read register step2.

Mandatory: guard band test (Removing of Bit0 of

Settings1 from the comparison is mandatory. Bit0 is

preprogrammed)

17. New power on cycle, if point 16 is correct. If point 16

fails, the test with the guard band test1 was not

successful and the device is incorrectly programmed. A

reprogramming is not allowed!

18. Read reg(0x0016) to reg(0x0019)

→ Read register step3

Application Information

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