Vanilla Ugly Board Layout...
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Arv Evans
Nov 7, 2007, 4:35:24 PM11/7/07
to ham...@googlegroups.com, avr_dev...@googlegroups.com, Eric Evans
Hi
Still playing with possible layouts for the ugly-wired Vanilla Board. Most of it seems to be falling in place rather easily, but slow because it has been several years since I did anything like this.
I still have to squeeze in the MISO, MOSI, Strobe, and Ground header for in-circuit programming.
I'm also tempted to put a 74LS390 dual-decade counter on the board. This would allow it to be a frequency counter, with capability to display frequency on the LCD, or send the frequency info to a PC via serial or USB interface.
Another question also...if I put a SIPO shift register (74HC164) on the board, this could become the LCD driver and reduce it's uP interface pin count requirement to just three leads (data and clock to the SIPO, and strobe to the LCD). Is freeing up those other six port pins important enough to justify the added chip?
Suggestions, comments, laughter, etc., all accepted with a smile.
Arv
_._
Still playing with possible layouts for the ugly-wired Vanilla Board. Most of it seems to be falling in place rather easily, but slow because it has been several years since I did anything like this.
I still have to squeeze in the MISO, MOSI, Strobe, and Ground header for in-circuit programming.
I'm also tempted to put a 74LS390 dual-decade counter on the board. This would allow it to be a frequency counter, with capability to display frequency on the LCD, or send the frequency info to a PC via serial or USB interface.
Another question also...if I put a SIPO shift register (74HC164) on the board, this could become the LCD driver and reduce it's uP interface pin count requirement to just three leads (data and clock to the SIPO, and strobe to the LCD). Is freeing up those other six port pins important enough to justify the added chip?
Suggestions, comments, laughter, etc., all accepted with a smile.
Arv
_._
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