Sundance SMT128 - Manual (Page 12)

Preliminary Page 12 of 15 SMT128 User Manual
J21, J24 – Virtex boot mode
With J21 in and J24 out, the SMT128 will boot from a serial prom. When booting
from X-checker header remove J21. J24 with reset the serial prom when in and may
be fitted when booting from x-checker if the serial prom is still fitted in the IC socket.
J30 – Flash Write Protect
This jumper must be fitted to permit write cycles to be accepted by the SMT128
FLASH memory.
J27, J28 – Com CPLD User I/O
These are connected to the SMT128 com-port CPLD for future expansion.