fifo system

[[email protected]]

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
*********************
<RXC========* byte1-8 (1) *<=====>RX 8*8bytes LPT PC PORT
* byte1-8 (2) *
* byte1-8 (3) *
DEVICE * byte1-8 (4) *
* byte1-8 (5) *
* byte1-8 (6) *
<RX=64BITS==* byte1-8 (7) *
*********************


The TXC and RXC is a 25kHz 10% duty cycle TTL block wave


Please help me out with info and partnumbers...


Kind regards, Geert De Coninck, Belgium

 

[Winfield Hill]

[email protected] wrote...

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

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.