JTAG,SWD, ARM CPus

http://www.support.code-red-tech.com/CodeRedWiki/HardwareDebugConnections
http://electronics.stackexchange.com/questions/81477/laying-out-a-10-pin-jtag-swd-connector-on-a-final-design
http://infocenter.arm.com/help/topic/com.arm.doc.faqs/attached/13634/cortex_debug_connectors.pdf
http://www.keil.com/support/docs/3506.htm

http://www.larsen-b.com/Article/315.html
http://www.larsen-b.com/Article/464.html
http://www.larsen-b.com/Article/398.html