SAM-BA lowlevel applet

The lowlevel applet initializes the device clock tree: CPU clock, Master clock (MCK), PLLs, ... The targetted frequencies are specific to each device. This applet should be executed only once afer reset, prior to the extram applet.

Applet initialization

The lowlevel applet doesn't accept any parameter to be initialized. The only exceptions are SAM9X60 and SAMA7G5 devices. In this later case, the list of supported parameters to initialize the applet can be displayed with the following command:

$ sam-ba -p serial -d sam9x60 -a lowlevel:help
Syntax: lowlevel:[<preset>]
Parameters:
    preset  System clock configuration
Examples:
    lowlevel    use default board settings if defined, preset 0 otherwise
    lowlevel:0  use preset 0 for system clock configuration

$ sam-ba -p serial -d sama7g5 -a lowlevel:help
Syntax: lowlevel:[<preset>]:[<xtalf>]
Parameters:
    preset  System clock configuration
    xtalf   Frequency (in kHz) of the Main Crystal Osciallator
Examples:
    lowlevel           use default board settings if defined, preset 0 otherwise
    lowlevel:0         use preset 0 for system clock configuration
    lowlevel::24000    skip the main crystal detection and force its frequency at 24MHz

CPU and Master clock frequencies

Supported commands

The lowlevel applet doesn't support any command.