AS7265X datasheet(40/64 Pages) OSRAM

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ams Datasheet

Page 39

[v1-04] 2018-Jul-09

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AS7265x − Detailed Description

Figure 51:

COEF WRITE Register

AS72651 I2C Firmware (FW) Update Procedure

• In the FW Update Control register set the Start_XFR bit to

• Write 56k of data to the FW Download register starting

with the first byte in the ams file, then proceed the end of

the ams 56k file with consecutive writes.

• If desired read the FW Byte Count registers to see which

byte is expected to be written next into the FW Download

• When the download file is completely written, confirm the

action by using the FW Update Control register bit XFR_

56k (should =1 if 56k has been downloaded).

• In the FW Update Control register, set the Toggle bit to 1

which will reboot the AS72651 with the new FW after

checking the new FW for correct CRC. If the CRC is incorrect

the toggle bit will not change and the new FW will not be

used.

Figure 52:

Firmware Byte Count High Byte

Addr:0x55

COEF WRITE

Bit

Bit Name

Default

Access

Bit Description

7:0

COEF_WRITE

R/W

Set sub addresses to write different calibration

data from COEF_DATA register to persistent

memory

Addr: 0x60/0xE0

Control_Setup

Bit

Bit Name

Default

Access

Bit Description

Start_XFR

R/W

Set to 1 to start firmware update

Kill_XFR

R/W

Set to 1 to stop firmware update.

XFR_56K

Set to 1 when 56k bytes have been downloaded.

Reserved

Reserved, do not use.

Toggle

R/W

Set to 1 to toggle firmware image partition.

2:0

Reserved

Reserved, do not use.

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