Helpful Links:

Basic H-Bridge theory: http://www.mcmanis.com/chuck/robotics/tutorial/h-bridge/

How H-Bridge works: http://www.armory.com/~rstevew/Public/Motors/H-Bridges/Blanchard/h-bridge.htm


The definition of H-bridge: http://www.maxim-ic.com/glossary/index.cfm/Ac/V/ID/155/Tm/H-Bridge

Guide to IC packages:
http://howto.wikia.com/wiki/Guide_to_IC_packages


SPI samples
http://www.piclist.com/techref/microchip/language/c/spi2serial-jff.htm