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TMS320F28377S: Not Running one of two dsp

Part Number: TMS320F28377S
Other Parts Discussed in Thread: C2000WARE

Dear All,

i have designed my PCB with respect example schematic of Texas instrument for TMS320F28377S. There are two DSP on one pcb as seen picture.

There are not any relation/connection or etc between this two DSP except CAN ports ( i have also disconnected them too) ,SPI ports and GPIO20, 21, but these two DSP can not run on same time!!!By the way, jtag port are seperated too...

i try to explain what is happening...

when you load code to dsp with seperately and reset the system (power on/off), the right one is running but left one is not runnig, at this time when you load program right one, the left one is running then after loading program to right one, right one is running too and both of them are running at this stage until reset system(power on-off again), if you reset system, the right one is running again, but left one is not running, if you load program to right one during energized system , left one will start to run again...

so there is not any relation between these 2 MCU except some ports ( i have wrote them) which are not important, i can not run two mcu on same time except some conditions as i explained, why??