This adapter allows you to use the JTAG programming algorithm with the AVR Hand-Held Programmer. It is supported in the Kanda programming software V1.2.5 and up.
Not only is this adapter required to program targets that have only a JTAG connector, but it is ideal for targets that have both JTAG and ISP connectors, as the JTAG programming is much faster.
Programming speed comparison
| ||ISP||JTAG |
|ATmega128 Program||27s||14s |
|ATmega128 Program and verify||49s||25s |
|ATmega2561 Program||50s||38s |
|ATmega2561 Program and verify||134s||109s |
To swap between modes, you just need to connect the adapter to the programmer and choose JTAG in the new software. To swap back, remove the adapter and unselect JTAG.
View JTAG pinout diagrams