红水杯

Circle teaches you how to play with the USB learning board

Overview

In the process of learning USB communication, I discovered the book "Quanquan Teaches You How to Play USB". I feel that this book is very good and I have benefited a lot. But this book has been published for more than ten years, and the accompanying learning board is basically impossible to find. So I want to use the Lichuang open source platform to reproduce the supporting learning board of this book. Of course, all rights still belong to Teacher Quanquan.
Some circuits have been slightly modified, namely:
1. The microcontroller is changed to STC89C52 in LQFP package, some ISP circuits are changed, and RS232 related circuits are cancelled.
2. The hard disk interface is changed to the more common double row of pins.
3. The USB interface is changed to a mini female port.

Modification history:
20220604
1. Fixed bug: K3 pin is not connected to GND
2. Add diode on RXD pin to facilitate program downloading.
3. Add 25Qxx related circuits to replace uncommon IDE interface hard drives.

Design Files

All reference designs on this site are sourced from major semiconductor manufacturers or collected online for learning and research. The copyright belongs to the semiconductor manufacturer or the original author. If you believe that the reference design of this site infringes upon your relevant rights and interests, please send us a rights notice. As a neutral platform service provider, we will take measures to delete the relevant content in accordance with relevant laws after receiving the relevant notice from the rights holder. Please send relevant notifications to email: bbs_service@eeworld.com.cn.

It is your responsibility to test the circuit yourself and determine its suitability for you. EEWorld will not be liable for direct, indirect, special, incidental, consequential or punitive damages arising from any cause or anything connected to any reference design used.

Hot

Technical Resources More

Search Datasheet?

Supported by EEWorld Datasheet

Technical Videos More

Forum More

Update:2025-06-19 01:26:48

What to consider when choosing an embedded vision camera?
The availability of powerful, compact single-board computers has enabled exciting new product designs. This is particularly true in applications where miniaturization is used to optimize cost and/or e
Can someone tell me what is wrong with the program that generates sqwm for msp430f5529? How can I fix it?
#include#include "spwm.h" char i; unsigned int j=1; int n=0; int t; const int spwm[]={ 0, 5 , 10, 15, 20, 25, 29, 34, 39, 44, 49, 54, 59, 64, 69, 73, 78, 83, 88, 93, 98, 102, 107, 112, 117, 121, 126,
Which simulation method is better to verify the function of the phase-locked loop?
Which simulation is better to verify the function of the phase-locked loop? I tried proteus, but the result was wrong. eeworldpostqq
Questions about stm8 software reset??
I would like to ask everyone~~ I don’t know if stm8 has a software reset function like stm32~~ If so, how to use it~~~
Freemodbus protocol based on single chip microcomputer
Is there anyone who is working on the modbus protocol based on a single-chip microcomputer? I have been studying it for a while and still have some questions. Can you share with me?
Which great god can help me design two narrow pulse modules using FPGA? The reward is 8K
[color=#252525][size=14px]Please design two narrow pulse modules. If the functions are OK, I will definitely reward you. The requirements are as follows: [/size][/color] [color=rgb(51, 51, 51)][size=1

Datasheet More

Circuits More