6.94 €
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CH341A Programmer USB to UART IIC SPI I2C - Parallel Port
Brand: satkit
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6.94€
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The CH341A Programmer USB to UART IIC SPI I2C Converter is a USB conversion module equipped with the CH341A chip, which acts as a USB bus adapter. This device provides multiple interfaces, including asynchronous serial port, parallel port, printing and a common 2-wire and 4-wire synchronous serial interface. It is an essential tool for serial expansion, EEPROM programming via I2C interface, SPI interface, FLASH programming and STC MCU, program debugging, data acquisition and more.
Main features:
- Supports USB to parallel printer port and EPP or MEM parallel port conversion.
- Compatible with USB to UART, I2C and SPI.
- Selectable output voltage and signal level between 3.3V and 5V.
- LED indicators for UART and SPI/I2C working status.
- Compact board size: 45 x 27 mm.
Technical specifications:
- UART interface: VCC, RXD, TXD, GND.
- I2C interface: VCC, SDA, SCL, GND.
- SPI interface: MISO, MOSI, SCK, CS2, CS1, CS0, GND, VCC.
- Printer port and EPP/MEM port with 10P 2.54mm pin header (refer to the manual for pin definitions).
Working modes:
- UART mode: jumper cap in UART, blue D2 indicator light on.
- I2C/SPI parallel and EPP/MEM mode: jumper cap in I2C/SPI, red D1 indicator light on.
- Printer parallel port mode: remove the jumpers and connect SDA and SCL together.
Output voltage selection:
- Jumper cap 2 on the 3V3 side for 3.3V.
- Jumper cap 2 on the other side for 5V.
This programmer is ideal for users who need an economical and functional solution for programming and debugging electronic devices that require UART, I2C, SPI or parallel port interfaces. Its compact design and versatility make it perfect for electronics projects, firmware development and hardware maintenance.
- Supports USB to parallel port, UART, I2C and SPI
- Selectable output voltage: 3.3V or 5V
- LED indicators for UART and SPI/I2C status
- Compact size: 45 x 27 mm
- Compatible with EEPROM, FLASH and STC MCU programming
Customer Questions & Answers
What are the dimensions, weight and main materials of the CH341A module?
The module measures 45 mm long by 27 mm wide, and is mainly made from FR4 fibreglass PCB and SMD electronic components. Estimated weight is under 20 grams, making it easy to integrate into breadboards or compact projects.
What power supply requirements and system compatibility does this converter have?
The CH341A is powered directly from the computer’s USB port (5V). It can select the output voltage and signal levels to 3.3V or 5V using jumpers. It is compatible with Windows, some Linux distributions and macOS, although driver availability and ease of installation may vary depending on the operating system and version.
Does the CH341A programmer require calibration or periodic maintenance for reliable use?
The module does not require calibration or periodic maintenance. It is recommended to keep the connectors clean and avoid exposure to moisture or electrostatic discharge. Under normal conditions and with proper handling, durability mainly depends on physical handling and electrostatic protection.
What relevant limitations does the CH341A have in terms of transmission speeds and signal tolerances?
The CH341A supports USART speeds of up to 2 Mbps, SPI typically up to 12 MHz and I2C up to 400 kHz (Fast mode). The configurable logic levels provide some flexibility (3.3V/5V), but errors may occur when connecting devices that require very strict timing tolerances or when integrating more than one protocol at the same time. It is not recommended for high-capacity NAND flashes.
What is the CH341A programmer used for?
It is used to convert USB to UART, I2C, SPI and parallel port interfaces, allowing programming and debugging of electronic devices.
What signal voltages does the CH341A programmer support?
It allows output voltages and signal levels of 3.3V or 5V to be selected using a jumper on the board.
Does the CH341A programmer have status indicators?
Yes, it has indicator lights for UART and SPI/I2C modes that show the working status.
What is the board size of the CH341A programmer?
The board size is 45 x 27 mm.
Can it be used for EEPROM programming?
Yes, it is compatible with EEPROM programming via the I2C interface.
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