Differences

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tutorials:pic24:pic24_differences [2010/10/15 11:11]
chrism Added I/O pin count to table
tutorials:pic24:pic24_differences [2010/10/15 11:27] (current)
chrism
Line 17: Line 17:
| Pin Count                    | 80                           | | Pin Count                    | 80                           |
| I/O Pins                          | 70                           | | I/O Pins                          | 70                           |
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==== PIC24 Highlights ==== ==== PIC24 Highlights ====
The PIC24 series of micro-controllers features a more powerful processor, more peripheral features, and more memory. The PIC24 series of micro-controllers features a more powerful processor, more peripheral features, and more memory.
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| Cap Touch Channels             | 16 | | Cap Touch Channels             | 16 |
==== PIC24 and PIC18 Comparison ==== ==== PIC24 and PIC18 Comparison ====
 +
 +The PIC18 series of micro-controllers is a great product line for beginner users and low-end projects.  Once you start getting to higher end projects that require more memory, more memory manipulation, more peripherals, and higher pin counts, you will need a bit more processor with some umph behind it.  The PIC24 series of micro-controllers gives 6 more MIPS on the top end while running at lower voltage and power, gives more peripheral features such as remappable peripherals, and generally has about the same number of general I/O pins.  While the PIC18 only has 2 interrupt priorities, the PIC24 series has at least 6 priorities of interrupts.
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 +The PIC18 uses the C18 compiler.  The C18 compiler is not a fully ANSI C compatible compiler.  In C18 you cannot dynamically allocate memory on the fly from a heap unless you write a complicated code to do the operations for you.  The PIC24 uses the C30 compiler, which is fully ANSI C compatible.  The C30 compiler allows dynamica allocation of memory from the heap, and also allows uData sections to be more easily defined.
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