Troubleshooting Guide
3-2
STK502 User Guide
2528A–AVR–11/02
Note:
1. See the application note “AVR065: LCD Driver for the STK502 LCD” on how to con-
trol the LCD-display or the the application note “AVR064: STK502 – A Temperature
Monitoring System with LCD Output”.
Parallel Programming
does not work.
Cables not connected
properly.
Please refer to Figure 2-7 for
correct Parallel Programming setup.
STK500 target voltage
error.
Please refer to the ATmega169 data
sheet for the Parallel Programming
Voltage limits. Adjust the target
voltage on the STK500 board
accordingly.
The TOSC switch is not
correctly set.
Set the TOSC switch in the XTAL-
position.
No programming works.
The RESET-signal is not
connected to the
ATmega169.
Connect PG5 and RST with a
jumper. See Section 2.2.2.2 RST.
Table 3-1. Troubleshooting Guide
Problem
Reason
Solution
