BETAProgram memory
Reset and vector table, the program, the configuration words; addresses in program-counter units (two per instruction).
Configuration words0xABF8 – 0xABFF4 words
Flash0x0000 – 0xABFF64.5 KB (22,016 instructions)
PIC24FJ64GA102 memory map
Where everything sits, at its exact address. The PIC24FJ64GA102 keeps program and data apart (modified Harvard). Program memory holds 24-bit instructions and is addressed in program-counter units, two per instruction, so flash ending at 0x00AC00 holds 22,016 instructions (64.5 KB, three bytes each). The data space is 16-bit and byte-addressed: the special function registers at the bottom, then the RAM. Constants in flash are read into data space through the program space visibility window from 0x8000 (PSV, or EDS on the newer chips).
Data memory
16-bit SFRs at the bottom, then the RAM; byte addresses.
RAM0x0800 – 0x27FF8 KB
Special function registers0x0000 – 0x07FF2 KB
Every segment
| Segment | Space | Start | End | Size | Page |
|---|---|---|---|---|---|
| Special function registers | data | 0x0000 | 0x07FF | 2 KB | |
| RAM | data | 0x0800 | 0x27FF | 8 KB | |
| Flash | prog | 0x0000 | 0xABFF | 64.5 KB (22,016 instructions) | |
| Configuration words | prog | 0xABF8 | 0xABFF | 4 words |