AS5047U-HTST datasheet(41/51 Pages) AMSCO

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ams Datasheet

Page 41

[v1-00] 2018-Oct-30

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AS5047U − Application Information

Figure 58:

OTP Memory Burn and Verification Flowchart

Note(s):

1. Device with wrong programming must not be used. Scrapping mandatory.

PASS

START

Write

Reg(0x0015)

Reg(0x0018)

Reg(0x0019)

Reg(0x001A)

Set magnet to the zero

position

Write

Reg(0x0017(5:0))=Reg(0x3FFF(5:0))

Reg(0x0016(7:0))=Reg(0x3FFF(13:6))

Read

Reg(0x0015)

Reg(0x0016)

Reg(0x0017)

Reg(0x0018)

Reg(0x0019)

Reg(0x001A)

Reg(0x001B)

Write

Reg(0x0015)=0x00

Reg(0x0016)=0x00

Reg(0x0017)=0x00

Reg(0x0018)=0x00

Reg(0x0019)=0x00

Reg(0x001A)=0x00

Reg(0x001B)=0x00

Power-on Reset

Read

Reg(0x0015)

Reg(0x0016)

Reg(0x0017)

Reg(0x0018)

Reg(0x0016)

Write

Reg(0x0003)=0x40

Verify 3

PASS

Read ANGLECOM

Write Angle into ZPOSL

and ZPOSM

Read

Reg(0x3FFF)

Read Registers step 1

(DISABLE,SETTINGS1,

SETTINGS2, SETTINGS3,

ZPOSM, ZPOSL and ECC)

Comparison of written

content

(DISABLE,SETTINGS1,

SETTINGS2, SETTINGS3,

ZPOSM, ZPOSL and ECC)

with Read Register step 1

read content

Unlock OTP area for

burning

(PROGEN=1)

Read OTP_CTRL

Set Guardband

Refresh memory with OTP

content

Read Register step 2

Comparison of written

content

(DISABLE,SETTINGS1,

SETTINGS2, SETTINGS3,

ZPOSM, ZPOSL and ECC) with

content of Read Register

step 2.

Mandatory Guardband-Test

Read Register step 3

Verify 1

Clear memory

Start OTP burning

procedure

(PROGOTP=1)

Power on cycle

Write

DISABLE,SETTINGS1,

SETTINGS2 and

SETTINGS3 register

Turn magnet to the

prospective Zero Position

Write

Reg(0x0003)=0x01

Write

Reg(0x0003)=0x08

Read

Reg(0x0003)

Reg(0x0003)==0x01

FAIL

OTP burning procedure

complete if

Reg(0x0003)==0x01

Write

Reg(0x0003)=0x04

Read

Reg(0x0015)

Reg(0x0016)

Reg(0x0017)

Reg(0x0018)

Reg(0x0019)

Reg(0x001A)

Reg(0x001B)

FAIL

Verify 4

Comparison of written

content

(DISABLE,SETTINGS1,

SETTINGS2, SETTINGS3,

ZPOSM, ZPOSL and ECC) with

content of Read Register

step 3

FAIL

PASS

FAIL

END

Correct

programming

and verification.

Wrong

programming.

Reprogramming

not allowed!

Read

Reg(0x3FD0)

Write

Reg(0x001B)

Read

Reg(0x0015)

Reg(0x0016)

Reg(0x0017)

Reg(0x0018)

Reg(0x0019)

Reg(0x001A)

Read Reg(0x0015) to

Reg(0x001A)

Read ECC Value

Write ECC (do not

overwrite ECC-en)

Write

Reg(0x001B)=0x80

Write ECC_EN

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