| Some of the port pins are not working |
The AVR is not mounted properly in the ZIF socket |
Make sure the chip is properly aligned in the socket. When the
springloaded latch is depressed, the chip should fit nively into the
bottom of the socket. |
| The code does not run |
The AVR has the wrong or no clock source |
Accorting the the clock fuse setting, select the appropriate
clock source on the STK500 and the STK503. Check the OSCSEL jumper
on the STK500 and the clock switch on the STK503. If you are using a
crystal in one of the sockets, check that it is firmly
mounted. |
| The AVR wil not run on X MHz, but works on lower
frequencies |
The clock frequency is exceeding the clock rate of t he AVR at
the given operating voltage |
Check that the AVR is running withing its specification. Check
the speed grading of the AVR and consult the datasheet for the
operating frequencies and voltages. |
| Crystals should be placed in the crystal socket on the
STK503 |
Place the crystal in the socket on the STK503. Set the clock
switch to the position closest to the crystal socket. |