The Figure 1 shows how to connect the JTAG ICE probe on the STK502 board.
Figure 1. Connecting JTAG to the STK502
The JTAG connector is used for the ATmega169 built-in JTAG interface. The pin out of the connector is shown in Figure 2-9 and is compliant with the pin out of the JTAG ICE available from Atmel. Connecting a JTAG ICE to this connector allows On-chip Debug- ging of the ATmega169.
More information about the JTAG ICE and On-chip Debugging can be found in the AVR JTAG ICE User Guide, which is available at the Atmel web site.
Figure 2. JTAG Connector
