CH341A Mobile: Turn Your Android Phone into a USB Programmer for SPI Flash and EEPROM
CH341A Mobile is a powerful Android application that transforms your smartphone into a CH341A USB programmer. By connecting a CH341A programmer through a USB OTG adapter, you can easily read, erase, write, and verify SPI Flash and EEPROM memory chips directly from your Android device — without needing a laptop or desktop computer.
Whether you repair routers, TVs, receivers, motherboards, or other electronic devices, CH341A Mobile provides a convenient solution for firmware programming, chip backup, and restoration.
Supported Memory Chips
CH341A Mobile supports a wide range of memory chips, making it useful for electronics repair professionals and hobbyists.
1. 25-Series SPI NOR Flash
The app includes a built-in catalogue of 577 supported chip models, including:
- Winbond W25Q series
- Macronix MX25L series
- GigaDevice GD25Q series
- EON EN25 series
- Many other compatible SPI NOR Flash chips
These chips are commonly found in routers, televisions, satellite receivers, and computer motherboards.
2. 24-Series I²C EEPROM
Supports a wide range of EEPROM chips, including 24C00 to 24C2048 and 24LC1025.
3. SPI EEPROM and F-RAM
Supports 25/95-series SPI EEPROM and SPI F-RAM memory devices.
4. 93C Microwire EEPROM
Supports 93C46 to 93C86 chips with both x8 and x16 data configurations.
Key Features of CH341A Mobile
Automatic Programming Mode
The Auto Mode makes chip programming easier by combining reading, erasing, writing, and full verification into a single operation. With just one tap, the app performs the complete programming process.
Manual Programming Mode
For users who prefer complete control, Manual Mode allows each operation to be performed separately:
- Read chip data
- Erase memory
- Perform blank check
- Write firmware
- Verify written data
Reliable Write Verification
Data verification is one of the most important parts of firmware programming. CH341A Mobile reads the programmed data back from the chip and compares it with the selected firmware file.
If verification fails, the app reports the failure instead of incorrectly displaying a successful result.
Live Programming Progress
The app provides real-time programming information, including:
- Current operation and progress
- Programming speed
- Elapsed time
- Estimated remaining time
- Current memory address
- Safe cancellation option
It can also continue working when the screen is off or the app is running in the background, with progress notifications.
Detailed Chip Information
CH341A Mobile provides useful chip identification and diagnostic information, including JEDEC ID, SFDP, addressing information, unique ID, and status registers.
Built-in HEX Viewer
The integrated HEX viewer allows users to inspect and compare:
- Original chip data
- Selected firmware files
- Verified flash contents
It also supports HEX and ASCII searching and direct navigation to specific memory addresses.
Firmware Backup and Restore
Before making any changes, users can read and save the original chip contents as a backup. These backups can later be used to restore the original firmware when needed.
BIN and Intel HEX File Support
The application supports BIN and Intel HEX firmware files. It also checks file size before programming. If a firmware file is larger than the selected chip's capacity, the app refuses the operation instead of automatically cutting or padding the file.
Adjustable Programming Speed
Users can select between three programming speed options:
- Safe
- Balanced
- Fast
The app can automatically reduce SPI timing when an unstable connection is detected, helping improve programming reliability.
1.8V Chip Protection
Some memory chips operate at 1.8V instead of the standard 3.3V. CH341A Mobile includes a safety protection feature that blocks writing to 1.8V chips until the user confirms that a suitable 1.8V adapter is connected.
Error Reporting
If a programming operation fails, users can send an error report to the development team with a single tap.
Private and Offline Programming
Privacy is another important feature of CH341A Mobile. The application does not require an account, and its core programming operations work completely offline.
Your firmware files, chip readings, and backups remain stored on your Android phone rather than being uploaded as part of the programming process.
Free Application with Fair Advertising
CH341A Mobile is free to use and includes a limited number of advertisements.
Advertisements are displayed when the app opens and after a successful programming operation. They never interrupt an active read, erase, write, or verify process.
Users can also watch a short video advertisement to enjoy 30 minutes of ad-free usage.
Supports 10 Languages
To make the application accessible to users worldwide, CH341A Mobile supports ten languages:
- English
- Roman Urdu
- Arabic
- Turkish
- Persian
- French
- Indonesian
- Russian
- Spanish
- Hindi
The application also offers both Dark Mode and Light Mode.
System Requirements
Before using CH341A Mobile, make sure you have the following:
- An Android smartphone running Android 8.0 or newer.
- USB Host (OTG) support.
- A USB OTG adapter or cable.
- A compatible CH341A USB programmer.
- A SOIC clip or suitable chip socket adapter.
- A 1.8V adapter for programming compatible 1.8V memory chips.
Important Safety Precautions
Firmware programming requires care. Writing an incorrect firmware file or interrupting a write operation may cause a device to stop working or become unable to boot.
Always read and save a backup of the original chip before making any changes. Make sure the selected firmware matches the target chip and use the application only on devices you own or are authorized to repair.
Firmware files are not included with the application.
Final Verdict
CH341A Mobile brings many essential CH341A programmer functions directly to Android smartphones. Its automatic and manual programming modes, wide chip compatibility, built-in HEX viewer, firmware backup and restore options, and reliable write verification make it a useful tool for electronics technicians, motherboard repair professionals, and firmware enthusiasts.
The ability to work offline without a computer is one of its biggest advantages. With a compatible CH341A programmer and OTG adapter, users can perform several common SPI Flash and EEPROM programming tasks directly from their Android phones.
Note: CH341 is a product of Nanjing Qinheng Microelectronics (WCH). CH341A Mobile is an independent application and is not affiliated with WCH.
Playstor Link
Ch341a Mobile - Apps on Google Play
Ch341a USB programmer for Mobile: read, write and verify SPI flash and EEPROM.
