Easy-DownloaderV1.1 MCS51编程器是一款非常简易的基于AT89C2051(2k) 和 AT89C4051(4k). 简单的硬件电路与容易上手的Windwos软件。本编程器的最初始版本软件是Wichit Sirichote在1997年为了自己学习用，而编写的用于自学的一款简易编程器。

1. 硬件电路

下面的原理图，是Easy-Downloader的编程硬件电路图。图中的AT89C2051需要一个固件程序 writer.hex，整个电路图包括的主要器件有：74HC373-8BIT锁存器，DS275-like，7805, LM317 以及 2N2222A 和 2N2907A两个三极管。本编程器的编程电压需要参考ATMEL－APPLICATION－NOTE。感兴趣的读者可以仔细去研究这款编程器电路。

• 软件说明

本编程器需要一个固件程序 writer.hex以及上位机软件EZ.exe，本站有Easy-Downloader V1.1编程器的文档下载。见本站的编程器软件下载部分。

DownloadEZ Uploader V3.0 for Window The EZ Uploader provides a simple means of sending HEX file to the writer board. To connect the board with EZ, click available COM port, COM1, say. After the EZ recognizes the chips, then click Send Hexfile, that all. Since there is no signature byte that indicates chip number and programming voltage, thus you have to choose the appropriated memory size either 2051 or 4051 manually, i.e.,  2048 or 4096 respectively.

DownloadEZ Uploader V3.1 for Window  An upgraded version of EZ3 with RAED and SAVE AS features for reading HEX code resided in the chip and save as an Intel HEX file.

 上面的英文是站长从国外网站直接复制过来的。大家可以自己翻译看看。站长就不翻译了。制作本编程器所需的一切工具和如软件本站都有下载。