AS5047U-HTST datasheet(39/51 Pages) AMSCO

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ams Datasheet

Page 39

[v1-00] 2018-Oct-30

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AS5047U − Application Information

Figure 57:

Programming Parameter

Note(s):

1. Programming parameter valid for AS5047U.

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 (1

μF 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 and SETTINGS3

registers with the Custom settings for this application

Place the magnet at the desired zero position

Read out the measured angle from the ANGLECOM

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

ANGLECOM[13:6] into the ZPOSM register

Read reg(0x0016) to reg(0x001A)

Set ECC_en in Register ECC to 1 (ECC protection

enabled)

Read ECC_s (0x3FD0) to get the correct ECC key

Write ECC_s key into ECC register

10. Read reg(0x0016) to reg(0x001B)

→ read register step1

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

content of read register step1

12. If point 11 is correct, enable OTP read / write by setting

PROGEN = 1 in the PROG register

13. Start the OTP burn procedure by setting PROGOTP = 1

in the PROG register

14. Read the PROG register until it reads 0x0001

(Programming procedure complete)

Symbol

Parameter

Conditions

Min

Typ

Max

Units

TaProg

Programming

temperature

Programming @ Room

Temperature

(25°C ± 20°C)

545

°C

VDD

Positive supply

voltage

5 V operation mode. Supply

voltage during programming

4.5

5.5

VDD

Positive supply

voltage

3.3 V operation mode. Supply

voltage during programming

3.3

3.5

IProg

Current for

programming

Max current during OTP burn

procedure.

100

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