STK520 User Guide
3-14
Rev. 7510A–AVR–08/05
Section 3
Troubleshooting Guide
Note:
1. See the application note “AVR065: LCD Driver for the STK520 LCD” on how to con-
trol the LCD-display or the the application note “AVR064: STK520 – A Temperature
Monitoring System with LCD Output”.
Table 3-1. Troubleshooting Guide
Problem
Reason
Solution
Serial Programming
does not work
ISP cable not connected.
Connect the ISP cable according to
Figure 2-4.
STK500 target voltage
error.
Please refer to the AT90PWM3
datasheet for the Serial
Programming Voltage limits. Adjust
the target voltage on the STK500
board accordingly.
The RSTDISBL Fuse is
programmed.
Use Parallel Programming to
unprogram the RSTDISBL Fuse.
Parallel Programming
does not work.
Cables not connected
properly.
Please refer to Figure 2-5 for
correct Parallel Programming setup.
STK500 target voltage
error.
Please refer to the AT90PWM3 data
sheet for the Parallel Programming
Voltage limits. Adjust the target
voltage on the STK500 board
accordingly.
Emulation does not
work.
ISP cable not connected.
Connect the ISP cable according to
Figure 2-7.
Conflict with STK500
Reset
Remove Reset Jumper on STK500
Board
DWEN fuse is not
programmed
Please set the DWEN bit using
parallel programming
The RSTDISBL Fuse is
programmed.
Use Parallel Programming to
unprogram the RSTDISBL Fuse.
Summary of Contents for STK520
Page 1: ...STK520 User Guide...
