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J30 – flash write protect, J27, j28 – com cpld user i/o, J21,j24 – virtext boot mode – Sundance SMT128 User Manual

Page 12: J27,j28 – com cpld user i/o

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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.