User's Manual

Page 78 of 83

A Carrier Corp. Company

PART NUMBER T82002163

REV A

4.1 Understanding the Load Command

The purpose of the ‘load’ command is to transfer an executable image to a device. The image must be in

one of the following supported formats: ELF, SREC, RAW, or BIN. The ‘load’ command uses

information inherent to the supported formats (or as entered as part of the command for RAW format)

to determine where in the device’s memory the downloaded image should be stored. The image must

be destined to run from either flash memory, system RAM, or on-chip SRAM.

If an image is destined for system RAM or on-chip SRAM, the ‘load’ command stores the image directly to

its run-time location. Refer to Figure 4.1: Downloading to RAM for a graphic representation of this

process.

If a downloaded application is destined for flash memory, the ‘load’ command transfers the file into a

temporary RAM buffer on the device. The transferred image may be programmed into flash using the

‘burn’ command after the transfer is complete. Refer to Figure 4.2: Downloading to Flash for a graphic

representation of this process.

Figure 4.1: Downloading to RAM

Figure 4.2: Downloading to Flash