Initialize Device Clock Tree (lowlevel)
The lowlevel applet initializes the device clock tree: PLLA, CPU Clock, and Master Clock (MCK).
The lowlevel applet applies to the following devices. Documentation is available in the ../sam-ba/doc/ directory.
| Device | Documentation |
|---|---|
| SAM9X60 | ../doc/sam9x60.html |
| SAM9XX5 | ../doc/sam9xx5.html |
| SAMA5D2 Series | ../doc/sama5d2.html |
| SAMA5D3 | ../doc/sama5d3.html |
| SAMA5D4 | ../doc/sama5d4.html |
| SAMV71 | ../doc/samv71.html |
Additional documentation is located in the ../doc/lowlevel.html document directory.
lowlevel Command Structure
The Initialize Device Clock Tree (lowlevel) applet should be executed prior to executing the Initialize External RAM (extram) applet. The lowlevel applet initializes the external RAM bus clock frequency.
The lowlevel applet has the following command structure:
$ sam-ba -p serial -d <device> -a lowlevel
The lowlevel applet does not require a parameter; with the exception of the SAM9X60 device. In this case, the help parameter shows the available parameters. SAM9X60 presets are listed in the ../doc/lowlevel.html document directory.
$ 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