I'm still working on serial boot mode for an SPC5605B. I found thread 320166 which, coupled with the RAppID Bootloader Utility, has enabled me to load code into ram via the serial port. However, The reference manual (Rev 7.1, P 96) says, "NOTE The start address is configurable, but most not lie within the 0x4000_0000 to 0x4000_00FF address range." The example Lukas gives in thread 320166 gives a starting address of 0x4000_000. Can you tell me why the program cannot be loaded into the first 0x100 addresses of RAM?