The CH341A EEPROM BIOS Flash USB Programmer Set is a versatile tool kit used to read, write, and erase data on memory chips. It is a popular choice for computer motherboard BIOS recovery, router firmware updates, and automotive ECU repairs.
Kit Contents
Most complete sets include the following components:
CH341A USB Programmer: The main module that connects to your computer via USB.
SOIC8 / SOP8 Test Clip: Allows for “in-circuit” programming, meaning you can clip onto a chip directly on a motherboard without desoldering it.
1.8V Adapter Board: Essential for low-voltage SPI flash memory chips (common in modern laptops) that would be damaged by standard 3.3V or 5V signals.
SOP8 to DIP8 Conversion Adapters: Includes modules for different chip widths (150mil and 200mil) for use in the programmer’s ZIF socket.
Key Specifications
Chip Compatibility: Supports 24 series (I2C EEPROM) and 25 series (SPI Flash) chips from manufacturers like Winbond, Macronix, and SST.
Voltage Support: Selectable power output for 3.3V and 5V; includes a separate 1.8V adapter for low-voltage chips.
Speed: Erasing and programming verification at roughly 2–3 Mbit per minute, significantly faster than older ATMEGA8-based tools.
Indicators: Features dedicated LEDs for Power and Data (TX/RX) activity.
Usage Tips
Orientation: Always align Pin 1 (usually marked with a dot or groove on the chip) with the red wire on the test clip and the corresponding mark on the programmer.
Drivers: You must install the CH341SER driver for Windows to recognize the device.
Software: Recommended applications include AsProgrammer, NeoProgrammer, or Flashrom (for Linux users).
Safety: Always backup (Read & Save) the original firmware before attempting to erase or write new data to ensure recovery if something goes wrong.
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