
PERIPHERAL INTERFACING–I 9-3
MASM, and then download the resultant hex file to the RAM on the trainer board. Then,
the processor on the trainer board will execute the program and give the results appropri-
ately. The trainer also has what is called a ‘monitor program’ to manage the whole setup.
With this brief introduction, we will start our discussion on the various peripher-
als and the corresponding interfacing chips. The sequence followed will be to present a
chip, its features and its programming and then use it for different applications.
9.2 | Programmable Peripheral Interface (PPI)-8255A
This chip is also called a parallel port chip and ...