After migration from Freescale to NXP it became unclear were to report bugs or concerns. Is Community really right place for this?
ECCSTAT RDY bit explanation from S12ZVC RM:
ECC Ready— Shows the status of the ECC module.
0 Internal SRAM initialization is ongoing, access to the SRAM is disabled
1 Internal SRAM initialization is done, access to the SRAM is enabled
CW startup routine seems not waiting for RDY==1. But setting reset vector to iaprstvect() routine and power cycling board I see 0x0070 loop count @ 0x3000. :
rdlp: INC D2
BRCLR.B ECCSTAT, #0, rdlp
ST D2, 0x3000 // save loop count
Looks like it takes quite a lot at power on to initialize ECC RAM. Long enough for default startup routine to set stack pointer and jump (BSR) to DoZeroOut() routine before ECC RAM initialization completes! Are there chances for big failure like reading wrong address from stack when returning back from DoZeroOut() to _Startup()?