Flash Memory - Alpha Data ADM-XRC-II User Manual

ADM-XRC-II User Manual
8.

Flash Memory

The flash memory fitted is 16 M Bytes of Intel Strata Flash – part No
28F128J3A and is paged into a 2 Mbyte region accessible on the Local Bus.
Refer to section 5.2 for further information on the flash paging register
The ADM-XRC-II is capable of loading the FPGA from flash on power up or
reset and will load the bitstream from the main memory section starting at
0x8001. This is to avoid any problem with the boot block which, if locked out,
cannot be unlocked without removing the flash device from the PCB. The byte
at location 0x8000 should be programmed with bit 0 = 0 (all other bits are
ignored) to enable the load sequence otherwise the assumption is the flash is
blank and should not be used.
ADM-XRC-II User Manual
Version 1.5
Page 21