The JTAG connector is intended for the ATmega128(L) that has a built-in JTAG interface. The pinout of the JTAG connector is shown in Figure 1 and is compliant with the pinout of the JTAG ICE available from Atmel. Connecting a JTAG ICE to this connector allows On-chip Debugging of the ATmega128(L).
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, www.atmel.com.
Figure 1. JTAG Connector
Figure 2 shows how to connect the JTAG ICE probe on the STK501 board.
Figure 2. Connecting JTAG ICE to the
STK501
