hANDshake

hANDshake checker and it is used in the design of USB or other material ,it is a simple one on the a

hANDshake checker and it is used in the design of USB or other material ,it is a simple one on the acadimic level

标签： hANDshake the material checker

上传时间： 2017-03-09

上传用户：asasasas
基于CH341A的USB串口通讯设计

为解决当前计算机串行通讯接口只有USB，难以满足旧型号设备或某些单片机要求RS232通讯的问题，设计出两款RS232/USB电路。采用CH341A与MAX223集成电路芯片构建标准9线RS232/USB通用接口转换器，无需编程。采用CH341A与PIC16F877A构建单片机与计算机之间的USB通讯电路，软件遵循RS232通讯协议，硬件进行电平转换。实际使用表明，这两款产品与计算机端Windows 操作系统下的串口应用程序完全兼容，且通讯过程中无握手失败现象。 Abstract: To solve the problem that current computer serial communication only with USB interface can not satisfy with the old type equipments or MCU to communicate with RS232， two kinds of RS232/USB circuit were designed.CH341A and MAX223 integrated circuit chips were used to create a standard 9-line RS232/USB universal interface convertor without programme. CH341A and PIC16F877A chips were adopted to build the USB communication circuit between computers and MCU. The software follows RS232 communication protocol， and the hardware converts electrical levels. Actual practices indicate that the two manufactures are compatible with serial application program of Windows operation system completely，and get avoid of hANDshake lost.

标签： 341A 341 USB CH

上传时间： 2013-11-03

上传用户：siying
Full compliance with the USB Specification v1.1 and USB CDC v1.1 Support the RS232 Serial interfa

Full compliance with the USB Specification v1.1 and USB CDC v1.1 Support the RS232 Serial interface Support automatic hANDshake mode Support Remote wake-up and power management 256 bytes buffer each for upstream and downstream data flow Support default ROM or external EEPROM for device configuration On chip USB transceiver On chip crystal oscillator running at 12M Hz Supports Windows 98/SE, ME, 2000, XP, Windows CE3.0, CE .NET, Linux, and Mac OS 28 Pins SOIC package 28

标签： Specification compliance 1.1 USB

上传时间： 2016-08-21

上传用户：dapangxie