FPGA #1 - An Overview of Programmable Logic Devices

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A look at PAL, PLA, CPLD, and FPGA devices.

Direct links to the lectures are:

My Boolean Algebra handout is here:

Music used in this video (Vibe Tracks, Alternate) was downloaded from the YouTube Audio Library.

#fpga
#ICE40HX

John's Basement

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Finally a series on the FPGA that’s going to be for normal humans! Looking forward to this series. Thank you!

velvetsound

Many presentations including your one excludes the Bipolar Fuseable link PROM such as the National 74S288 / Signetics 82S123 (256 bits arranged as 32x8 bits). It was used in some S100 boards such as the Cromenco SCC & Australian DGZ80 then later in the Australian MicroBee computer. It was easily field programmable by blasting its nichrome fuses by applying +10V on the VCC pins, selecting the desired address to be programmed and applying 63mA (usually 12-18V) to the desired output pins to have their fuses blown. When PALs first came out the manufacturers were secretive about the programming algorithms so expensive programmers needed to be used. I actually had to go to the manufacturer’s offices to program them. Thank goodness in the 1990’s sanity prevailed with the release of GALs which were reprogrammable (but still requiring the use of special programmers).

PebblesChan

Watched FPGA #7 first, then this. Absolutely excellent. I’ve been interested in FPGA’s for a while and looked at various documents and videos. This is by far the best explanation. Looking forward to more and finally being able to start to play, program, simulate and understand these

symosys

actively looking forward to this series

amipacks

The GAL16V8, GAL20V8 & GAL22V10 (& equivalents) are very useful. They come in DIP packages and are great for all sorts of things including glue logic and decoders.

PebblesChan

I am so glad that I found your channel and this video

jchidley

Oooo. Interesting. I'm hoping to learn a lot from upcoming video's on this topic especially when you get hands on and I can follow along.

DennoWiggle

Very well explained, John! I look forward to seeing what magic you weave with my favorite tool the FPGA!

timgordon

Another awesome topic. I’m Looking forward to the rest of the series.

sparkybrit

Looking forward to this series. I'd like to understand these concepts better: when to use wire vs reg, always block parameters, always block with no parameters, blocking vs non-blocking, when to use assignments that are tied to logic in an always block and several other design elements.

jamesross

Yes! This is the series I've been hoping for! Monte Dalrymple's book, "Microprocessor Design Using Verilog HDL" might be of interest a bit further down the line, especially since he is Z80-centric (designed the Rabbit CPUs).

jackrubin

Really getting a late start with this video... Looking forward to it. I have always wanted to get into FPGAs.

gregorymccoy

Thks & I've been trying to figure-out how to start

tombouie

One thing about modern FPGAs & CPLDs is that they don’t come natively in an inexpensive high gate count 5V low pin count DIP package. Having to deal with BGAs and logic level translators are a real pain in the proverbial!

PebblesChan

So... on internal input bus (XYZ) in line two from bottom to top, do you have X_+Y_+Z shorted together?

TC-ztsp

Hi John,
I'm new to FPGA design boards. Do you have any videos explaining EEPROM programming for your FPGA board?, im trying to desing my own

brtgiononsens

really valuable channel. I got out of school (Computer Science) last year. Got really into networking/OS stuff in school and got a good job. But Ive been really wanting to learn FPGA and logic design work for the purpose of making FPGA based NICs. I managed to grab myself a few alveo u200 boards for cheap online but have had trouble looking for good info to experiment with implementing things on there.

I definitely will come back to this channel periodically.

stevepa

Great overview. It's wild how early you see these kinds of things on old hardware, especially the later versions of ISA cards.

ewetoo

At first I thought he was strident and clumsy, but then his logic tied me up and raped me.
Well done, Professor.

davidgari

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