For initial bring-up of our B4860 we have selected the hard-coded RCW (cfg_rcw_src[0:8]=0b0_1000_0110).
Using a USB TAP we can get to a point where DCFG_CCSR_BRR = 0x00000001 (release core 0 for boot) but core 0 is in a doze state. How do we avoid this or recover from it?
We don't see the same behaviour with a B4860QDS with hard-coded RCW.
Our SYSCLK = 66.667MHz and DDRn_CLKs = 133.333 MHz.
In case it's related, we also see another difference between our system and B4860QDS: When looking at registers with USB TAP, reading I2C registers seems to crash something and registers become unreadable, needing a restart to recover.
I'm a B4860 rookie, so any help with where to start looking for the cause would be appreciated.