[sdiy] external memory for microcontrollers

[Ingo Debus]

> Am 16.02.2017 um 00:06 schrieb Eric Brombaugh <ebrombaugh1 at cox.net>:
> 
> It's easy to set up and works without too much fuss. You'll generally find that you have to move to the 144-pin package to get sufficient pins for a memory connection though, and that will increase the cost of the MCU somewhat.

I’ve heard that the PCB traces for the address/data lines have to be matched in length. Is this really true?

Ingo