PIC32MX795F512L-80IPT Datasheet, PDF (61/68 Pages) Microchip Technology – PIC32 Flash Programming Specification

APPENDIX A: PIC32 FLASH
MEMORY MAP
FIGURE A-1: FLASH MEMORY MAP
0x1D000000
Program Flash Memory
0x1D007FFF
Boot Page 0
0x1F000000
Boot Page 1
Boot Page 2
Debug Page
Configuration Words
(4 x 32 bits)
0x1F001FFF
0x1F002FF0
0x1F002FFF
Note:
The memory map shown is for reference
only. Refer to the “Memory Organization”
chapter in the specific device data sheet for
the memory map for your device.
PIC32
APPENDIX B: HEX FILE FORMAT
Flash programmers process the standard hexadecimal
(hex) format used by the Microchip development tools.
The format supported is the Intel^® HEX32 Format
(INHX32). Please refer to Section 1.75 “Hex file
Formats” in the “MPASM™ Assembler, MPLINK™
Object Linker, MPLIB™ Object Librarian User’s Guide”
(DS33014) for more information about hex file formats.
The basic format of the hex file is:
:BBAAAATTHHHH...HHHHCC
Each data record begins with a 9-character prefix and
always ends with a 2-character checksum. All records
begin with ‘:’, regardless of the format. The individual
elements are described below.
• BB – is a two-digit hexadecimal byte count
representing the number of data bytes that appear
on the line. Divide this number by two to get the
number of words per line.
• AAAA – is a four-digit hexadecimal address
representing the starting address of the data
record. Format is high byte first followed by low
byte. The address is doubled because this format
only supports 8 bits. Divide the value by two to
find the real device address.
• TT – is a two-digit record type that will be ‘00’ for
data records, ‘01’ for end-of-file records and ‘04’
for extended-address record.
• HHHH – is a four-digit hexadecimal data word.
Format is low byte followed by high byte. There
will be BB/2 data words following TT.
• CC – is a two-digit hexadecimal checksum that is
the 2’s complement of the sum of all the
preceding bytes in the line record.
Because the Intel hex file format is byte-oriented, and
the 16-bit program counter is not, program memory
sections require special treatment. Each 24-bit
program word is extended to 32 bits by inserting a so-
called “phantom byte”. Each program memory
address is multiplied by 2 to yield a byte address.
As an example, a section that is located at 0x100 in
program memory will be represented in the hex file as
0x200.
The hex file will be produced with the following
contents:
:020000040000fa
:040200003322110096
:00000001FF
Notice that the data record (line 2) has a load
address of 0200, while the source code specified
address 0x100. Note also that the data is
represented in “little-endian” format, meaning the
Least Significant Byte appears first. The phantom
byte appears last, just before the checksum.
 2007-2013 Microchip Technology Inc.
DS61145L-page 61