fifo system

Jun 04, 2005 1 Replies
Q

I want to make some io interface which can read/write 64 bitpatterns from/to the LPT port. The FIFO must be synchronized on clock signals TXC and RXC.


SENDING DATA TO LPT: minimum 64bit memory (to store x datapatterns) FIFO System ********************* =TXC=======>* byte1-8 (1) *======>TX 8*8bytes LPT PC PORT * byte1-8 (2) * * byte1-8 (3) * DEVICE * byte1-8 (4) * * byte1-8 (5) * * byte1-8 (6) * =TX=64BITS=>* byte1-8 (7) * *********************


RECEIVING DATA TO LPT: minimum 64bit memory (to store x datapatterns) FIFO System *********************


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W

I use Cypress FIFOs that are stocked by DigiKey, for example the CY7C419-10JC is an 8-bit 256-word FIFO in a 32-pin PLCC package, selling for $6.78 each.

If you want a 28-pin DIP package instead, you could get something like Fairchild's 74ACT2708, 64x9 FIFO, although being an older part it costs more.

Thanks, - Win
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