Memory
Memoy Map
| Memory Section | Start Address | End Address |
|---|---|---|
| Reset Vector | 0x0000 | – |
| User Memory | 0x0001 | 0x0003 |
| Interrupt Vector | 0x0004 | – |
| User Memory | 0x0005 | ** |
| User ID | 0x8000 | 0x8003 |
| Rev ID | 0x8005 | – |
| Dev ID | 0x8006 | – |
| Config Word 1 | 0x8007 | – |
| Config Word 2 | 0x8008 | – |
| Config Word 3 | 0x8009 | – |
| Config Word 4 | 0x800A | – |
| Config Word 5 | 0x800B | – |
| Dev Info | 0x8100 | 0x811F |
| Dev Config Info | 0x8200 | 0x82FF |
| Data Flash Mem (EEPROM) | 0xF000 | 0xF0FF |
**End Memory Address
- PIC16LF19196: 0x3FFF - 16k words (28KB)
- PIC16LF19197: 0x7FFF - 32k words (56KB)
Note: A single address points to a 14-bit chunk of memory
Configuration Words:
Configuration words are 14-bits in length and contain configuration for the PIC prior to startup.
Program Flash Memory:
The datasheet shows that the PIC16LF19196 has memory availble from address 0x0000 to 0x3FFF which is a total of 16,383 memory addresses. I can’t seem to find any information on these extra addresses, do they just round to 16k words? To be determined..
Program flash memory is divided and subdivided into chunks, with the smallest being a:
Word - 14 bits, holds an instruction and the needed arguments. Each word is referenced with a 15-bit address.
64 words combine to form a:
Row - 64 words. the smallest chunk of memory you can write. Writes cannot cross row boundaries.
32 Rows combine to form a:
Page - Pages are the largest chunk, holding 2048 words.
Data Memory (RAM):
Data Memory is partitioned into 64 memory banks of 128 bytes each. Uses a 13-bit address.