DAOKAI CH341A 24 25 Series EEPROM Flash BIOS USB Programmer Module User Manual

1. Introduction

The DAOKAI CH341A USB Programmer Module is a versatile tool designed for reading, writing, erasing, and verifying data on 24 series EEPROM and 25 series Flash BIOS chips. It is suitable for a wide range of applications, including memory management in TV sets, desktop motherboards, LCD displays, notebook routers, and other electronic devices requiring chip programming or data recovery.

2. Product Overview

2.1 Components

The package includes the following components:

• 1 x CH341A 24 25 Series EEPROM Flash BIOS USB Programmer
• 1 x SOIC8 SOP8 Flash Chip IC Test Clip
• 1 x 8Pin to 8Pin Converter
• 1 x SOP8 SOP16 to 8Pin Converter
• 2 x 2.54mm 4Pin header
• 1 x 1.5m USB extension cable

Figure 1: Overview of the DAOKAI CH341A USB Programmer Module kit, showing the main programmer, SOIC8 SOP8 test clip, converters, and USB extension cable.

2.2 Features

Key features of the CH341A Programmer Module include:

• Supports 25SPFLSAH and 24EEPROM chips.
• Provides 5V/3.3V voltage output.
• Includes a 500mA resettable fuse for protection.
• Supports USB to TTL / MCU program download.
• Utilizes a stable CH341A chip for reliable operation.
• Capable of multiple online flashing operations.
• Supports in-circuit programming for EEPROM 24CXX / 25CXX / 93CXX via SOIC8 SOP8 Test Clip.

Figure 2: Diagram illustrating key features of the CH341A programmer, including support for 25 SP/FLSAH, USB to TTL, 24EEPROM, MCU program download, 5V/3.3V output, stable CH341A chip, 500mA self-recovery fuse, and multi-flashing capability.

3. Setup Instructions

1. Driver Installation: Before connecting the programmer, install the necessary drivers for the CH341A chip on your computer. These drivers are typically available online from the manufacturer or chip vendor.
2. Connect Programmer: Insert the CH341A USB Programmer Module into an available USB port on your computer.
3. Prepare Chip: Identify the target EEPROM or Flash BIOS chip. Ensure the device containing the chip is powered off and disconnected from its power source.
4. Connect Test Clip/Converter:
   • For in-circuit programming, attach the SOIC8 SOP8 Flash Chip IC Test Clip to the target chip. Ensure correct pin alignment and firm contact.
   • For out-of-circuit programming, carefully place the chip into the appropriate converter (e.g., SOP8 SOP16 to 8Pin Converter) and then insert the converter into the ZIF socket on the CH341A programmer. Pay close attention to the chip series (24XX or 25XX) and align it with the corresponding pins on the programmer.
5. Connect Converters (if applicable): If your specific chip configuration requires the 8Pin to 8Pin converter, connect it as instructed by your chip's datasheet or programming guide.
6. Software: Launch the CH341A programming software on your computer.

Figure 3: Detailed wiring instructions diagram for the CH341A programmer, highlighting components like the CH341A chip, self-recovery fuse, power indicator, read/write indicator, 12M crystal oscillator, AMS1117 chip, SPI pin multi-function expansion port, Black Gold IC Block, USB header, and pin assignments for 24 and 25 series chips.

4. Operating Instructions

Follow these steps to operate the CH341A programmer:

1. Detect Chip: In the programming software, select the correct chip type (e.g., 24XX or 25XX series) and click the 'Detect' or 'Read ID' function to ensure the programmer recognizes the connected chip.
2. Backup (Read): To create a backup of the existing data on the chip, select the 'Read' function in the software. Specify a file name and location on your computer to save the data. It is highly recommended to always back up existing data before any write operations.
3. Erase: Before writing new data, it is often necessary to erase the chip's current contents. Select the 'Erase' function in the software and confirm the erase operation when prompted.
4. Load Data (Open File): Load the desired firmware or data file (e.g., .bin, .hex) into the programming software.
5. Program (Write): Select the 'Program' or 'Write' function to transfer the loaded data to the chip. Monitor the progress indicator in the software and ensure no errors occur during the writing process.
6. Verify: After programming, it is crucial to verify the written data against the source file to confirm data integrity. Select the 'Verify' function in the software. This step ensures that the data was written correctly and without corruption.
7. Disconnect: Once all operations are complete and verified, safely disconnect the programmer from your computer and carefully remove the chip or test clip.

5. Maintenance

To ensure the longevity and proper functioning of your CH341A Programmer Module:

• Keep the programmer and all accessories clean and dry. Avoid exposure to dust, moisture, and extreme temperatures.
• Store components in their original packaging or a protective case when not in use to prevent physical damage.
• Handle the test clip and converters with care to prevent bending or damaging the pins.
• Do not attempt to disassemble the programmer module, as this may void any implied warranty and could cause damage.

6. Troubleshooting

If you encounter issues while using the CH341A Programmer Module, refer to the following common problems and solutions:

• Programmer not recognized by computer:
  • Ensure CH341A drivers are correctly installed on your operating system.
  • Try connecting the programmer to a different USB port on your computer.
  • Test with a different USB extension cable if you are using one.
• Chip not detected by software:
  • Verify that the chip is correctly seated in the ZIF socket or that the test clip has good, firm contact with all pins of the target chip.
  • Ensure the correct chip series (24XX/25XX) is selected in the programming software.
  • Check for any bent or damaged pins on the chip, adapter, or programmer.
  • Confirm the target device is completely powered off and disconnected from its power source when using the test clip.
• Programming or verification errors:
  • Ensure the chip is fully erased before attempting to write new data.
  • Verify that the data file you are attempting to write is not corrupted and is compatible with the target chip.
  • Check for a stable power supply to the programmer. While USB powered, a faulty USB port or insufficient power from the port can cause issues.
• Test clip connection issues:
  • Ensure the test clip is making firm and correct contact with all pins of the chip. Sometimes, slight adjustments are needed.
  • If persistent issues occur, consider that the included test clip might be sensitive to connection quality.

7. Specifications

8. Package Contents

The complete package includes:

• 1 x CH341A 24 25 Series EEPROM Flash BIOS USB Programmer
• 1 x SOIC8 SOP8 Flash Chip IC Test Clip
• 1 x 8Pin to 8Pin Converter
• 1 x SOP8 SOP16 to 8Pin Converter
• 2 x 2.54mm 4Pin header
• 1 x 1.5m USB extension cable