Core Firmware Flashing

Tools Required

Following are the list of tools that can be used to flash Logicrom core firmware:

SoC / Chipset	Flashtool	Download Link
RDA8910	Logicrom Flasher	Logicrom Flasher v25.20.39.1
	QFlash	QFlash_V5.0
ASR1601/ASR1603	Aboot	aboot-tools-2020.11.20-win-x64
	QFlash	QFlash_V5.0
RDA8955	Coolwatcher	cooltools RDA8955
	Firmware Update tool [1]	firmwarw_tool_v2.1
MT2593/MT6261	Logicrom GSM Flasher	Logicrom GSM Flasher v2.1.0
	IDE Flashing	MT2503/MT6261 Core Re-Flashing

[1]

use fpupgrade.exe only. DO NOT use fpdownload.exe, it will erase all calibration and IMEI information.

Core Firmware Download

Logicrom core firmware for supported modules can be downloaded from github page: https://github.com/waybyte/logicrom_core

Module Name	Latest Core
RDA8955	Logicrom_rda8955_core_v0.4.0.lod
A7670C	Logicrom_ASR1601_A7670C_v0.4.0.zip
A7672E	Logicrom_ASR1603_A7672E_v0.4.0_VOLTE.zip
EC100N-CN	Logicrom_ASR1603_EC100NCN_v0.4.0.zip
EC100Y-CN-AA	Logicrom_ASR1601_EC100YCN_v0.4.0.zip
EC200N-CN-AA	Logicrom_ASR1603_EC200NCN_v0.4.0.zip
EC200N-CN-LA	Logicrom_ASR1603_EC200NCNLA_v0.4.0.zip
EC200S-CN-AB	Logicrom_ASR1601_EC200SCNAB_v0.4.0.zip
EC200U-CN-AA	EC200UCN-AA_LOGICROM_v0.4.0_VoLTE.pac
EC200U-CN-AB	EC200UCN-AB_LOGICROM_v0.4.0_VoLTE.pac
EC200U-EU	EC200UEU_LOGICROM_v0.4.0_VoLTE.pac
EC600N-CN-AA	Logicrom_ASR1603_EC600NCN_v0.4.0.zip
EC600S-CN	Logicrom_ASR1601_EC600SCN_v0.4.0.zip
EC600U-CN	EC600UCN-LB_LOGICROM_v0.4.0_VoLTE.pac
EG912Y-EU	Logicrom_ASR1603_EG912YEU_v0.4.0.zip
EG915N-EU	Logicrom_ASR1603_EG915NEU_v0.4.0.zip
EG915U-EU	EG915UEU-AB_LOGICROM_v0.4.0_VoLTE.pac
L610-CN	L610-CN-00_LOGICROM_v0.4.0_VoLTE.pac
N58-CA	N58-CA_LOGICROM_v0.4.0_VoLTE.pac
N716-CA	N716-CA_LOGICROM_v0.4.0_VoLTE.pac

Put Device in Bootloader Mode

In order to start flashing, module must be put in Bootloader mode. The procedure for entering bootloader is different for all chipset. Following are the steps for modules based on their chipset type.

RDA8910/UIS8910

• AT Command Method

  1. Open USB AT command port

  2. Check port is working, by entering “AT” and modem should respond “OK”.

  3. Enter AT command to put module is USB download:

     For other vendors and Logicrom core: AT^FORCEDND

     For Quectel, boot mode command is: AT+QDOWNLOAD=1

• Force USB Boot Hardware Method

  1. Locate USB_BOOT and VDD_EXT pin from hardware reference manual of module.

  2. Connect USB_BOOT with VDD_EXT directly or via resistor.

  3. Reset module, it should now be in USB boot mode.

To check if device is in boot mode or not, open Device Manager. There should be a USB serial port with name “SPRD U2S Diag”. If you do not see the port in device manager, There could be two possibilities:

1. Device is not in USB boot, Follow any of the two steps mentioned above.

2. If you do see a serial port device but with name “USB Serial Device”. You can also verify the device by checking its VID/PID (1728/4D11). Right click on the device and update driver.

ASR1601/ASR1603

• Reboot Method

  ASR chipset runs bootloader before starting core. If bootloader has not damaged or corrupted, simplest way is to start flashing software and reboot the device.

• Force USB Boot Hardware Method

  If you happen to damage your device bootloader, you can put device in USB boot mode using hardware method.

  1. Locate USB_BOOT and VDD_EXT/VDD_1V8 pin from hardware reference manual of module.

  2. Connect USB_BOOT with VDD_EXT/VDD_1V8 directly or via resistor.

  3. Reset module, it should now be in USB boot mode.

RDA8955

There is no special method, just connect HOST_UART or DBG_UART of module with PC and run flashing software.

MT2503/MT6261

There is no special method, just reset the device and flashing should start. If you are using USB flashing make sure correct driver is installed and you should see device named “MediaTek USB Port” in device manager.