AN440 Datasheet | Philips Semiconductors

.. Philips Semiconductors Microcontroller Products Application note RAM loader program for 80C51 family applications Author: Greg Goodhue The following program allows an 80C51 family microcontroller to load most of its code into a RAM over a serial link after power up and execute out of the RAM for normal operation. This can allow a final product to have firmware updates done by a simple diskette mailing. Such a program is often called a “bootstrap loader”. For this example, it is assumed that the code download is done via a serial munication link, although the program could be adapted to other forms of download. The ments at the beginning of the listing are...