CPLD and FPGA programming.pdf

文档介绍：CPLD / FPGA programming and with E-
blocks
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About this presentation
„ This presentation was
developed by John Dobson
– Managing Director of
Matrix Multimedia Limited.
„ PowerPoint versions of this
presentation are available
on request.
„ Notes on the presentation
are included with each
slide down here:
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Why study CPLD/FPGA programming?
„ A modern context for Digital Electronics
„ Death of the 74xxx device
„ You can plex circuits with ease
„ A key skill that industry wants –
particularly ‘System on Chip’ design
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Some definitions
„ CPLD: Complex Programmable Logic
Device
„ FPGA: Field Programmable Gate Array
These do essentially the same thing with different
technologies…more later
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What do they do?
„ These are reprogrammable logic devices
„ Designers use software to develop any
digital circuit they like and the program
the chip to perform the function
„ They are very fast – much faster than a
microcontroller
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A modern CPLD
„ The equivalent of 13
22V10s in one chip
„ 128 flip flops or
Logic Elements
„ Electrically
reprogrammable
„ Can be programmed
in a number of
different languages
„ $10 (mid volume)
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Modern CPLDs effectively consist of a number of PLDs in the same package.
Electrically erasable now.
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Modern CPLD architecture
„ Not really
INPUT/GCLK1
INPUT/OE2/GCLK2 important from a
INPUT/OE1
user’s point of view
INPUT/GCLRn – the software
6 or 10 output enables 6 or 10 output enables
LAB B
2 to 16 LAB A 2 to 16 takes care of it.
36 36 I/O
I/O 2 to 16 Macrocells Macrocells 2 to 16
control 1 to 16 17 to 32 control
block
2 to 16 I/O block 2 to 16 I/O
16 16
2 to 16 2 to 16
6 6
PIA
LAB D
LAB C 2 to 16
2 to 16 36 36
I/O
I/O Macrocells Macrocells
2 to 16 2 to 16 control
control 33 to 48 49 to 64