Electronics & Programming

develissimo

Open Source electronics development and programming

  • You are not logged in.
  • Root
  • » AVR-GCC
  • » [avr-gcc-list] Re: Intermittent connections with clone JTAG ICE [RSS Feed]

#1 Nov. 27, 2005 13:41:16

Mike Y.
Registered: 2009-11-02
Reputation: +  0  -
Profile   Send e-mail  

[avr-gcc-list] Re: Intermittent connections with clone JTAG ICE


Never mind... I dug (shallowly) into the archives, and quickly found a noteto check the power supply. The jtag device ships without a jumper to enablepowering itself from USB. What's odd now is not that it had intermittentproblems, but that it worked at all. Without the jumper, it draws its powerfrom the target board, in this case the Butterfly. The Butterfly shipswithout R402, a 0R jumper that connects its power to the JTAG port. Very oddthat it should work at all unpowered.----- Original Message -----From: "Mike Young" <>To: <avr-gcc-l***@*ongnu.org>
Sent: Sunday, November 27, 2005 5:21 AM
Subject: Intermittent connections with clone JTAG ICEI bought a clone JTAG ICE from Microcontroller Pros(http://microcontrollershop.com/product_info.php?products_id=1106&osCsid=b6732e459ab35fe55dc115a10aec8f52)thinking to play around with the Butterfly. AVR Studio 4.12 has troubleconnecting to it, and once connected, often drops the connection. Avaricedoesn't see the device at all. Sometimes, forcing a reset on the Butterflyallows AVR Studio to connect briefly. "Briefly" means a few minutes of_______________________________________________
AVR-GCC-list mailing list
AVR-GCC-list@nongnu.orghttp://lists.nongnu.org/mailman/listinfo/avr-gcc-list

Offline

#2 Nov. 28, 2005 06:21:06

Joerg W.
Registered: 2009-11-02
Reputation: +  0  -
Profile   Send e-mail  

[avr-gcc-list] Re: Intermittent connections with clone JTAG ICE


"Mike Young" <> wrote:

> Very odd that it should work at all unpowered.

It probably got its power from an input protection diode.

--
cheers, J"org .-.-. --... ...-- -.. . DL8DTLhttp://www.sax.de/~joerg/NIC: JW11-RIPE
Never trust an operating system you don't have sources for. ;-)



_______________________________________________
AVR-GCC-list mailing list
AVR-GCC-list@nongnu.orghttp://lists.nongnu.org/mailman/listinfo/avr-gcc-list

Offline

  • Root
  • » AVR-GCC
  • » [avr-gcc-list] Re: Intermittent connections with clone JTAG ICE [RSS Feed]

Board footer

Moderator control

Enjoy the 22nd of April
PoweredBy

The Forums are managed by develissimo stuff members, if you find any issues or misplaced content please help us to fix it. Thank you! Tell us via Contact Options
Leave a Message
Welcome to Develissimo Live Support