NGW/NGW100 JTAG and NEXUS
From AVRFreaks Wiki
The Network Gateway have two programming and debugging interfaces, the JTAG interface and the NEXUS interface. Only the 100-mil JTAG connector is mounted on the printed circuit board.
JTAG
The JTAG interface lets you program the external flash and debug software running on AP7000. The pin-out follows Atmel's standard pin-out and is compatible with the JTAGICE-mkII from Atmel
NEXUS
The NEXUS interface lets you program the external flash and debug software running on AP7000. The pin-out follows recommendations from the Nexus 5001™ Forum. The pin-out match table A-8 of ieee_isto_5001_2003.pdf.