Hi, What exactly is the sequence/flow from power-on till Interrupt Vector table is encountered? In LPC2294's manual it is specified that boot code is located at 0x7FFF E000. Is this the first value in PC register after power on? Or is it 0x0000 0000? After boot code execution is completed how is the first instruction (of user-programmed code) loaded?
UM10114 LPC21xx and LPC22xx User manual Rev. 03 â€" 2 April 2008
Chapter 21: LPC21xx/22xx Flash memory controller
5.1 Memory map after any reset The boot block is 8 kB in size and resides in the top portion (starting from 0x0001 E000 for devices with 128 kB flash and from 0x0003 E000 for devices with 256 kB flash) of the on-chip flash memory. After any reset the entire boot block is also mapped to the top of the on-chip memory space. i.e. the boot block is also visible in the memory region starting from the address 0x7FFF E000. The flash boot loader is designed to run from this memory area, but both the ISP and IAP software use parts of the on-chip RAM. The RAM usage is described later in this chapter. The interrupt vectors residing in the boot block of the on-chip flash memory also become active after reset, i.e., the bottom 64 bytes of the boot block are also visible in the memory region starting from the address 0x0000 0000. The reset vector contains a jump instruction to the entry point of the flash boot loader software.