CH341A Programmer USB to UART IIC SPI TTL ISP Converter

CH341A Programmer USB to UART IIC SPI TTL ISP Converter is a versatile USB programming and communication tool widely used for flashing EEPROMs, interfacing with microcontrollers, and serial communication. It supports multiple protocols including UART, I2C, SPI, and ISP, making it an essential tool for embedded developers and electronics hobbyists.

Key Features:

• Multi-Protocol Support: Supports UART, IIC (I2C), SPI, and TTL/ISP interfaces.
• EEPROM Flashing: Compatible with 24/25 series EEPROM chips and BIOS programming.
• USB Powered: Direct power supply from USB port, no external power required.
• Compact Design: Easy to carry and ideal for field programming tasks.
• Wide OS Support: Works with Windows, Linux, and some open-source flashing tools.

Technical Specifications:

• Chipset: CH341A
• Supported EEPROMs: 24Cxx, 25Cxx, W25Qxx, and many others
• Communication Interfaces: UART, SPI, IIC, TTL
• Voltage Levels: 3.3V and 5V logic selectable
• USB Interface: USB 2.0 Type-A
• Baud Rate: Up to 12 Mbps (SPI)

Mechanical Specifications:

• Form Factor: USB stick size with exposed pin header
• Dimensions: Approx. 5.5cm × 2.0cm × 1.0cm
• Board Type: Double-layer PCB with gold-plated contacts
• Indicator: LED for power and operation

Pinout and Wiring:

• SPI Pins: CS, CLK, MISO, MOSI, GND, VCC
• UART Pins: TXD, RXD, GND, VCC
• I2C Pins: SDA, SCL, GND, VCC
• Power Selection: Jumper to select 3.3V or 5V output

Datasheet and Software Tools:

• CH341A Datasheet and Driver Installer (ZIP)

Applications:

• EEPROM Programming: BIOS flashing and chip recovery for 24/25 series EEPROMs.
• Microcontroller Debugging: Interface with Arduino, STM32, and ESP boards via UART or SPI.
• Firmware Uploading: Used in embedded boards for bootloader updates.
• Protocol Conversion: Useful as USB-to-Serial or USB-to-I2C bridge for legacy hardware.
• Repair Shops: Commonly used to recover dead laptops and rewrite corrupted ROMs.

Equivalent Models:

• FT232RL USB to Serial: UART-only USB converter used in embedded projects
• CP2102 USB UART: Stable USB to TTL module for MCU communication
• RT809H Programmer: Professional-grade EEPROM programmer for advanced users

Package Includes:

• 1 x CH341A Programmer USB Module
• 1 x 8-Pin Test Clip or Dupont Cable (Optional in some versions)