!!top!! - Aot4221sr Firmware Upgrade

Firmware Upgrade Guide for the AOT4221SR Device

: Always perform the upgrade using an Ethernet cable rather than Wi-Fi to avoid connection drops that can "brick" the device. Power Stability

Abstract

Depending on the specific generation of your AOT4221SR board, you will need one of the following methods to transfer the firmware: aot4221sr firmware upgrade

1. Open the Flash/Upgrade software on your PC.
2. Select the correct COM Port and Baud Rate (usually 115200 or 9600).
3. Click "Connect" or "Search Device".
4. Once connected, browse for the Firmware File (.hex or .bin).
5. Click "Upgrade" or "Start Programming".
6. Do not unplug the device. Wait until the progress bar reaches 100% and the software says "Upgrade Successful" or "Verify OK."
7. The controller should reboot automatically.

Host Interface

| Item | Specification / Action | |------|------------------------| | | USB-to-I²C isolator (e.g., FT4232H) or dedicated programmer per AOT application note AN-4221 | | Supply Voltage | 5.0V ±1% on VDD pin; ensure no load on VOUT during upgrade | | Firmware Binary | Signed .aot or .hex with CRC16 checksum (validate using aot_checksum -c firmware.bin ) | | Backup | Dump current firmware via aot_read --full if device is unlocked | Firmware Upgrade Guide for the AOT4221SR Device :

7. Post-Upgrade Validation: Do Not Skip This

System Tools > Backup

Before uploading new software, navigate to . Save your current settings file to your PC. This allows you to restore your specific parameters quickly after the update. Step 4: Upload and Flash Open the Flash/Upgrade software on your PC