CH341A USB EEPROM Flash BIOS Programmer – 24/25 Series, 5V, USB to TTL

The CH341A is a compact USB programmer designed to read, write, erase, and verify 24-series EEPROM and 25-series SPI flash memory chips. Built around the CH341A USB bus converter chip, it connects to a computer through a standard USB port and supports 8-pin and 16-pin devices, with automatic recognition of 25-series chips. The board includes dedicated 24 and 25 status indicator LEDs that show which memory family is active, and it provides a USB-to-TTL mode for serial communication and STC microcontroller programming. A jumper allows the operating mode to be switched between programmer and USB-to-serial adapter functions, and exposed SPI pins support application expansion. The programmer operates from a 5V USB supply and is compatible with widely used software such as AsProgrammer and NeoProgrammer on Windows, Linux, and macOS. It is commonly used to repair or reflash BIOS chips on laptop and desktop motherboards, restore firmware on industrial equipment, and test or duplicate memory chips in repair and development work. The compact board measures 8.6 × 2.8 × 1.5 cm and draws low current, making it suitable for repeated bench use. This CH341A USB programmer is a practical tool for electronics technicians, hardware engineers, and makers who need a low-cost, reliable way to service 24C and 25C memory devices.

1. Reading, writing, erasing, and verifying 24-series EEPROM chips.
2. Programming and recovering 25-series SPI flash memory and BIOS chips.
3. BIOS repair and reflashing on laptop and desktop motherboards.
4. Firmware restoration on industrial and embedded equipment.
5. USB-to-TTL serial communication and STC microcontroller programming.
6. Memory chip testing, duplication, and educational electronics projects.

1. Model: CH341A.
2. Main chip: CH341A USB bus converter.
3. Supported memory: 24-series EEPROM and 25-series SPI flash, 8-pin and 16-pin packages.
4. Interface: USB 2.0 full speed.
5. Operating voltage: 5V (USB bus power).
6. Current: 1A (rated); actual consumption is low and suitable for extended use.
7. Chip detection: automatic recognition of 25-series devices.
8. Status indicators: separate LEDs for 24-series and 25-series operation.
9. Additional mode: USB-to-TTL with online getroot support; STC series programming.
10. Expansion: SPI pins for application extension.
11. Supported software: AsProgrammer, NeoProgrammer, and compatible tools.
12. Operating system compatibility: Windows, Linux, and macOS.
13. Compatible brands: ATMEL, CATALYST, MICROCHIP, HOLTEK, ISSI, ROHM, ST, XICOR, RAMTRON, FAIRCHILD.
14. Dimensions (L × W × H): 8.6 × 2.8 × 1.5 cm.