In SX Microcontrollers, SX/B Compiler and SX-Key Tool, SteveW wrote:

Bear in mind that the original poster did almost everything possible to make his board as crash-prone as possible, and the board still mostly worked unless he provoked it with nearby sparks. A 2-layer board, done right, while it will be a pain to get through CE EMC compliance testing, should be fine as a development platform. You get a _lot_ of help from the SX, since all its resources are on-chip. Just feed it power, clocks and reset according to the datasheet, and if you're unsure at all, post your design for a quick review. 

Metal boxes are still useful, but it's _always_ better to design the board right in the first place. Cheaper, too. 

Steve

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