![]() ![]() The clock input pin X1 of the ZIF socket is derived from X2 withoutbuffering. The programming voltage shown a bit differentfrom version 1.1, Vpp pin needs only +5V and +12V and simply activatedby P3.3. Programming mode selection is done by P3.4 to P3.7.See in ez52.c for details. Look at A14, our software uses P2.6, while ATMELuses P3.0 instead. P0 is for bi-directional data transferring. The 89C51 with ez52.hex receives a 9600 baud serialdata from PC and generates the appropriated signal applying to the ZIFsocket. Hardware Figure 1 shows the circuit diagramof Easy-Downloader V2.0. ![]() The great thing about RD2 chips is that you don't need programmer, they come from the factory with the bootloader, just buid/buy MAX232 circuit above to connect it to pc and use FlashMagic/EasyIAP/etc program to send the hex file to the 89C51RD2. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |