На стр 124 пишут нечто, но понять не смог.
Цитата
Persist Option
The persist bitstream option maintains the configuration logic access to the multi-function
configuration pins after configuration. The persist option is primarily used to maintain the
SelectMAP port after configuration for readback access, but persist can be used with any
configuration mode. Persist is not needed for JTAG configuration since the JTAG port is
dedicated and always available. Persist and ICAP cannot be used at the same time.
The persist option can also be used to reconfigure the device from an external controller
without pulsing the PROGRAM_B pin or using the JTAG port. The multi-function pins
that persist depend on the configuration mode pin settings, and are the same as those
shown for each configuration mode in Table 2-2, page 22 and Table 2-3, page 23, except
that PUDC_B and DOUT_CSO_B never persist. Any I/O pins that persist cannot be used
as I/O in the user design. Use the CONFIG_MODE constraint to reserve the correct pins
during implementation of the design. Persisted I/O use the general-purpose I/O standard
default of LVCMOS, 12 mA drive, Slow slew rate.
Ага, понял. Мне не нужен persist mode. Наоборот.