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Parallel ports and data rates
01/21/2015 at 03:12 • 0 commentsIn order to interface to the VFD, I need a datasheet for it. I found that datasheet here: http://datasheet.elcodis.com/pdf/11/45/114557/gu140x32f-7000.pdf.
As I need a high refresh rate to display interesting information, and I want to learn how to implement something in Verilog that isn't an RS232 port, I'm using the VFD's parallel port. I have heard that these VFDs can manage 60-70Hz refresh rates so I'll try pushing the limits with animation. As a rough calculation, the data I'll be sending at 60Hz over each of the 8 parallel ports is
which is certainly manageable with a 50MHz Spartan6.
Pinouts for the parallel connector:
Pin number Signal name Function Direction 1 GND Ground I 2 VCC Power (6VDC max) I 3 NC - - 4 RS Switch signal I 5 /WR Data write I 6 /RD Data read I 7 D0 Data input IO 8 D1 Data input IO 9 D2 Data input IO 10 D3 Data input IO 11 D4 Data input IO 12 D5 Data input IO 13 D6 Data input IO 14 D7 Data input IO