I've got a simple circuit with an ATtiny25 on which I indend to do in system programming. I'm wondering, will the rest of my circuit interfere with the SPI programming?
So the data sheet says:
- PB0 = MOSI, this is used as an output so should be fine
- PB1 = MISO, this is used as an output so should be fine
- PB2 = SCK, this is used an input, connected to a voltage divider. So the 442 ohm resistor will cause a 7.4/11.3 mA current at 3.3/5 V, respectively.
Am I screwed here, is that too much?
Edit: I'm planning to use the Atmel-ICE programmer, but can't find any docs on how much current that can source.