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AS5116

Configuration and Programming

Datasheet

• PUBLIC

DS000686

• v4-00 • 2022-Feb-18

34

│ 26

10

Configuration and Programming

The non-volatile memory is used to permanently program the configuration. To program the

nonvolatile memory, the UART interface is used. The programming could be performed either in 5 V or

in 3V3 operation mode operation. Tighter limits of the supply voltage in 3V3 operation has to be

considered (VDDBURN).

Figure 31:

AS5116 Programming Flow

Start

END

PASSED Programming

Process

Write: CONFIG

CONFIG1 (0x16)

CONFIG2 (0x17)

CUST_CHIP_ID1 (0x18)

CUST_CHIP_ID2 (0x19)

CUST_CHIP_ID3 (0x1A)

Write: ECC Enable

ECC (0x1B) = 0x80

Read: ECC_CHECKSUM

ECC_Chsum_calc (0x50)

Write: ECC

ECC (0x1B) = 0xXX

Read: ECC_STATUS

ECC_STATUS (0x51)

Verify:

ECC_STATUS == 0x01

Read: CONFIG

CONFIG1 (0x16)

CONFIG2 (0x17)

CUST_CHIP_ID1 (0x18)

CUST_CHIP_ID2 (0x19)

CUST_CHIP_ID3 (0x1A)

Verify:

Compare with written data

Write: P2RAM_CONTROL

P2RAM_CONTROL (0x03) = 0x01

Write: P2RAM_CONTROL

P2RAM_CONTROL (0x03) = 0x08

Read: P2RAM_CONTROL

P2RAM_CONTROL (0x03)

Verify:

P2RAM_CONTROL == 0x01

Write: CONFIG

CONFIG1 (0x16) = 0x00

CONFIG2 (0x17) = 0x00

CUST_CHIP_ID1 (0x18) = 0x00

CUST_CHIP_ID2 (0x19) = 0x00

CUST_CHIP_ID3 (0x1A) = 0x00

ECC (0x1B) = 0x00

Write: P2RAM_CONTROL

P2RAM_CONTROL (0x03) = 0x40

Write: P2RAM_CONTROL

P2RAM_CONTROL (0x03) = 0x04

Read: CONFIG

CONFIG1 (0x16)

CONFIG2 (0x17)

CUST_CHIP_ID1 (0x18)

CUST_CHIP_ID2 (0x19)

CUST_CHIP_ID3 (0x1A)

ECC (0x1B)

Verify:

Compare with written data

PASS

PASS

FAIL

FAIL

FAIL

PASS

PASS

END

FAILED Programming

Process

FAIL

Write all required

configuratios to the

sensor

Enable ECC function

Read the sensor internal

generated

ECC-Checksum

Write the previously

read ECC-Checksum into

ECC register

Read content of

ECC_STATUS register to

check if ECC function is

working correctly

Read again all

configuration registers,

to check content with

previously written data

Unlock programming

features within

P2RAM_CONTROL

register

If ECC_STATUS register

content = 0x01, ECC

functionality is working

correctly. Otherwise go

back to step ECC Enable

Compare read data with

written data. Regsiter

contant has to match

Start internal

programming procedure

Read P2RAM_CONTROL

register to check if

programming is already

finished.

Set all previously written

and programmed

registers to 0x00.

Trigger guard band load

process, which is

proofing the OTP fuse

quality.

Reflash register content

with programmed

configuration

Read all written and

programmed

configuration registers.

Check if register

content == 0x01. If so,

internal programming

process is finished. If

not, programming is

ongoing (it takes 10 ms

maximum).

Compare read datae

with previously written

content. If the content is

eqal, programming is

finished and valid.