dsPIC33CK256MP202 memory map

Where everything sits, at its exact address. The dsPIC33CK256MP202 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 0x02C000 holds 90,112 instructions (264 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).

Program memory

Reset and vector table, the program, the configuration words; addresses in program-counter units (two per instruction).

User OTP words0x801700 – 0x8017FF128 words
Configuration words0x2BF00 – 0x2BFFF128 words
Flash0x0000 – 0x2BFFF264 KB (90,112 instructions)

Data memory

16-bit SFRs at the bottom, then the RAM; byte addresses.

RAM0x1000 – 0x6FFF24 KB
Special function registers0x0000 – 0x0FFF4 KB

Every segment

SegmentSpaceStartEndSizePage
Special function registersdata0x00000x0FFF4 KB
RAMdata0x10000x6FFF24 KB
Flashprog0x00000x2BFFF264 KB (90,112 instructions)
Configuration wordsprog0x2BF000x2BFFF128 words
User OTP wordsprog0x8017000x8017FF128 words