This post summarizes the CH347 resources I use most often, with one goal: get you from setup to debugging/programming as quickly as possible.

If you are new to CH347, prepare your environment in this order:

1. Check the official product page first
2. Install the correct driver for your use case
3. Prepare an SPI Flash tool and verify connectivity

Official Entry

• CH347 product page: https://www.wch.cn/products/CH347.html

It is best to download from the official page first, to avoid outdated or unknown-source driver packages.

Common Drivers

1) CH341PAR.EXE

Purpose:

• USB-to-JTAG / SPI / I2C / Parallel / GPIO interface driver

Typical use:

• Multi-protocol communication and low-level interface debugging with CH347

2) CH343SER.EXE

Purpose:

• Vendor Windows driver for high-speed USB-to-Serial

Typical use:

• Using CH347 mainly as a serial tool, especially at higher baud rates

SPI Flash Programming Tool

• AsProgrammer: https://github.com/nofeletru/UsbAsp-flash

Common tasks:

• Detect SPI NOR Flash
• Read chip ID
• Back up original firmware
• Erase / write / verify firmware

Recommended Workflow (to avoid common mistakes)

1. After installing drivers, replug the device and confirm detection in Device Manager.
2. Before first write, do one full read + backup of the original contents.
3. Always run verify after writing. Do not rely only on a “write successful” message.
4. If the chip is not detected, check power, voltage level, and wiring before checking software settings.

Quick Troubleshooting

1. Device is plugged in but not visible in tools: usually driver loading issues, or a power-only USB cable.
2. Device is detected but read/write fails: first check wiring order, shared ground, and power stability.
3. Unstable behavior at high speed: lower read/write speed first, then increase gradually after stability is confirmed.

Summary

CH347 is not hard to use. The key is to get four things right: driver, tool, wiring, and verification.

The resources above cover most beginner and day-to-day maintenance scenarios, and should get you to a stable workflow quickly.