ThingMagic M5e-Compact - Manual (Page 46)

Flash Memory
46 Functionality of the Embedded Modules
Flash Memory Sector Mapping
Accessing the Flash
The flash is accessed only through the boot loader program. Flash is not accessible while
the application FW is running.
All accesses to flash are in terms of two-byte word addresses and word lengths. Thus,
the Write Flash Sector,
Read Flash Sector , Erase Flash Sector , and Modify Flash
Sector commands all use the same argument types. The maximum amount of flash that
can be written or modified at a single time is 125 words, and the maximum amount of
flash that can be read at a single time is 124 words. This is a limitation of the serial
interface and data packet sizes. Multiple data packets are used to read/write/modify a
larger area of flash.
When using the Erase Flash Sector or Write Flash Sector commands, the correct
password must be provided to complete the operation. This is done to protect against
accidentally erasing or writing to the flash. See
Boot Loader Commands .
Upgrading Application FW
The application FW is upgraded in flash. New versions of firmware are released in a or
.sim binary file format for the M5e and M5e-Compact.The .sim binary file format is a
compressed file format that stores the data in raw binary.
Direct Flash Addressing
The modules also provide a direct interface to the flash memory. This is a legacy interface
and is not recommended for new development efforts.
Sector Access Code
M5e/M5e-
Compact
Start Addr
M5e/M5e-
Compact
Size
(bytes)
BootLoader Read Only 0x01 0x000000 8 kB
Application Read/Write 0x02 0x004000 224 kB
User Memory Read/Write 0x03 0x03C000 16 kB
Hardware Info Read Only 0x04 0x002000 8 kB