Sysboot read error

Hi,

when I do a hot plug with my board which based on beaglebone,the board entrys an error state,it doesn't work any more.

Normally,doing a hot-plug means a power-on reset,and the board works OK.

But,sometimes,the board boots failed,it is reseted by the external watchdog ,I disable the internal watchdog,and using an external watchdog.

I found that the supply of TPS65217 is OK(3V3A,3V3B,and so on).

I use a XDS100v2 connect the CPU througth the JTAG interface, it successed.

control_status Register ，0x44e10040,value is 0x00400300，SYSBOOT：0x4000，it is error.

what‘s wrong?

YanTCK