The JTAG interface use four pins to communicate with the target. For further information on how to use the programming and debugging capabilities of the EDBG, see Embedded Debugger.
| ATmega324PB pin | Function | Shared functionality |
|---|---|---|
| PC2 | JTAG-TCK | J200 |
| PC3 | JTAG-TMS | J200 |
| PC4 | JTAG-TDO | J200 |
| PC5 | JTAG-TDI | J200 |