Specifications
mikroElektronika | Free Online Book | PIC Microcontrollers | Chapter 1: PIC16F887 Microcontroller - Device Overview
Fig. 1-3 PIC16F887 Block Diagram
Pin Description
As seen in Fig. 1-1 above, the most pins are multi-functional. For example, designator RA3/AN3/Vref+/C1IN+ for the fifth
pin specifies the following functions:
● RA3 Port A third digital input/output
● AN3 Third analog input
● Vref+ Positive voltage reference
● C1IN+ Comparator C1positive input
This small trick is often used because it makes the microcontroller package more compact without affecting its
functionality. These various pin functions cannot be used simultaneously, but can be changed at any point during
operation.
The following tables, refer to the PDIP 40 microcontroller.
http://www.mikroe.com/en/books/picmcubook/ch1/ (4 of 14)5/3/2009 11:31:25 AM