Hi,
when looking at the ISP parts for example in the circuit for PowerSwitch I see that Pin 8 and 10 of the ISP connector are connected to PD0 and PD1 and thus to ground.
What is the meaning of doing this?
Connection ISP Pins 8 and 10
Since it's not necessary to have four ground pins, I usually connect two of them to RxD and TxD for debugging purposes. AVR-Doper can even read the debug info from these pins.
If you use AVR-Doper for In System Programming, you can print debug info through the ISP cable and AVR-Doper.
The additional resistor limits the current if a programmer with four ground pins is connected.
If you use AVR-Doper for In System Programming, you can print debug info through the ISP cable and AVR-Doper.
The additional resistor limits the current if a programmer with four ground pins is connected.