| Some of the port pins are not working |
The AVR is not properly mounted in the ZIF socket |
Make sure the chip is properly aligned in the socket. When
the spring-loaded latch is released, the chip should fit nicely
into the bottom of the socket. |
| The code isn't running |
The AVR has no or wrong clock source. |
According to the clock fuse setting, select the appropriate
clock source on STK500 and STK504. Check the OSCSEL jumper on
STK500 and clock switch on STK504. If you are using a crystal in
one of the sockets, check that it is firmly mounted in its
socket. |
| The AVR will not run on x MHz, but works ok on lower
frequencies |
The clock frequency is exceeding the clock rate of the AVR
(at a certain operatingvoltage). |
Check that you are running the AVR within specifications.
Check the speed grade of the AVR and consult the datasheet for
operating frequencies and voltages. |
| The AVR will not run on x MHz, but works ok on lower
frequencies. I have a x MHz crystal mounted on STK500 |
Crystals should be placed in the crystal socket on
STK504 |
Place the crystal in the socket on STK504. Set the clock
switch to the HF position |