Olimex AVR-USB-JTAG & AVR Butterfly

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Fried
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Joined: Mon. Nov 14, 2005
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Posted by Fried: Fri. Nov 18, 2005 - 01:05 PM
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Good news,
the 2 work well together, after having connected 4.8V (4*1.2) NiMH Accus to the Butterfly, because the BF internal battery was too weak for the Olimex. I would recommend not to connect the JTAG Pin 7 to the Vcc but rather use external power as the original Atmel JTAG does. Everything else run fine, as long as you define COM1 or COM2 in the USB/RS232 driver, else AVR Studio will not find the JTAG. BTW I found a LCD simulator in the web, is there any info on how to program plugins for AVR Studio? Up to now I didn't find anything in this respect.

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AVR Microcontrollers, megaAVR and tinyAVR
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smileymicros
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Joined: Wed. Nov 17, 2004
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Location: Great Smokey Mountains.
Posted by smileymicros: Fri. Nov 18, 2005 - 03:09 PM
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The Butterfly battery is too weak even for the Butterfly if you plan to use the RS232 port. After a brief period plan on saying good bye not only to your battery, but if you happen to be using the bootloader, you might set a fuse bit accidently as the power drops and have to reprogram the thing with the ISP connection (pure speculation, but probable).

Smiley

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