1.1 ROM Code

The boot ROM code begins execution when the processor comes out of reset. Before loading a boot image, the ROM configures:

• the PLLA initialization,
• the Processor Clock (PCK) and Master Clock (MCK).

The ROM code determines the boot sequence by reading a bit in the Boot Configuration Packet. It then loads the second-stage bootloader from non-volatile storage into the on-chip SRAM.