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DOC1925 Datenblatt(PDF) 54 Page - List of Unclassifed Manufacturers

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Bauteilbeschribung  User Guide
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Troubleshooting Guide
7-2
AVR STK500 User Guide
1925C–AVR–3/03
The AVR device cannot be
programmed (continued).
Reset disable fuse is set.
Check reset disable fuse.
Programming too fast
Check oscillator settings and
make sure it is not set higher
than actual clock.
External pull-up resistor on
reset line too low.
Ensure that external pull-up
resistor is
≥ 4.7 kΩ.
AVR Studio does not detect
STK500.
Serial cable is not connected,
or power is off.
Connect serial cable to
RS232 PROG and check
power connections.
PC COM port is in use.
Disable other programs that
are using PC COM port.
Change PC COM port.
AVR Studio does not detect
COM port.
Disable COM port auto-
detection in AVR Studio file
menu. Force COM port to
correct COM port.
STK500 cannot be switched
off.
Positive center power
connector is used.
Use negative center power
connector.
Turn off STK500 by removing
power connector.
The status LED is blinking
slowly
There is a short circuit on
AREF
Resolve the short circuit.
The status LED is blinking
quickly.
There is a short circuit on
VTARGET.
Resolve the short circuit.
An external VTARGET is
being used and has been
turned off.
Set VTARGET to a value
below 0.3V in AVR Studio.
The LEDs don’t work
(running from external
VTARGET).
STK500 must be powered for
LEDs to work.
Supply poser to STK500 and
turn it on.
Table 7-1. Troubleshooting Guide (Continued)
Problem
Reason
Solution



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