Data Sheet

ams Datasheet Page 39

[v1-04] 2018-Jul-09 Document Feedback

AS7265x − Detailed Description

Figure 51:

COEF WRITE Register

AS72651 I

C 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

7 Start_XFR 0 R/W Set to 1 to start firmware update

6 Kill_XFR 0 R/W Set to 1 to stop firmware update.

5 XFR_56K 0 R Set to 1 when 56k bytes have been downloaded.

4 Reserved Reserved, do not use.

3 Toggle 0 R/W Set to 1 to toggle firmware image partition.

2:0 Reserved Reserved, do not use.