Interfacing PIC Microcontrollers

System Design

When designing a microcontroller application, we normally start with a spec-

ification of the functions the system is intended to perform. The appropriate

chip should then be provisionally selected. Any given design team is likely to

have a preferred choice for the type of controller, since they will have experi-

ence and development tools to support that type already. Alternative types

will probably be considered only if the default range cannot provide the fea-

tures required, or there is some other reason to change, such as designing for

a customer who uses a different range and is tooled up for products based on

this type.

Specification ...