[Top][All Lists]

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

[avr-gcc-list] ATMega128 pcb, startup problem...

From: Torsten Mohr
Subject: [avr-gcc-list] ATMega128 pcb, startup problem...
Date: Wed, 1 Jun 2005 18:12:23 +0200
User-agent: KMail/1.8


i've just made a new PCB for an atmega128 that i'd like to start up now.

I use "uisp -dprog=dapa" to connect to the target, but this only leads
to an error:

address@hidden:~> uisp -dprog=dapa
An error has occurred during the AVR initialization.
 * Target status:
   Vendor Code = 0xff, Part Family = 0xff, Part Number = 0xff

 Check if the programmer is properly connected.
 The wiring may be incorrect or target might be 'damaged'.

I checked:

Power supply with CRO looks stable
no oscillation on the external crystal
GND pins 22, 53, 63 are at GND
VCC pins 21, 52 , 64 are at +5V
Reset pin is logically connected to parallel port "INIT"
MOSI, Pin 12 is logically connected to parallel port "D0"
MISO, Pin 13 is logically connected to parallel port "Busy" and "Sel.In".
SCK, Pin 11 is logically connected to parallel port "Strobe".
PEN, Pin 1 is at GND level.

I connected a 6 MHz crystal and two 22 pF capacitors to the crystal circuit.

What more can i do to test the ATMega128?

Any more things to check?

When looking at the micro in a way that i can read the printing on it 
then pin 1 is in the upper left corner, correct?  In that corner there is a 
in the micros surface.  Another dot is printed (only printed, no changed 
in the lower right corner.  Is the micro correctly soldered onto the pcb?

What else could be wrong?

Can i give some more information?

Any help is appreciated.

Best regards,

reply via email to

[Prev in Thread] Current Thread [Next in Thread]