Performs the low-level initialization of the chip.
Performs the low-level initialization of the chip.
Initialisation depends on where the application is executed:
- in sdram: it means that sdram has previously been initialized. No further initialization is required.
- in sram: PLL shall be initialized in LowLevelInit. Other initializations can be done later by the application.
- in norflash: LowLevelInit can't be executed in norflash because SMC settings can't be changed while executing in external flash. LowLevelInit shall be executed in internal sram. It initializes PLL and SMC. This function also reset the AIC and disable RTT and PIT interrupts