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Re: [avr-chat] Re: AVR in Jtag Chain (was: Programmer for everyone!)
From: |
Uwe Bonnes |
Subject: |
Re: [avr-chat] Re: AVR in Jtag Chain (was: Programmer for everyone!) |
Date: |
Fri, 13 Jul 2007 10:15:29 +0200 |
>>>>> "Steve" == Steve Franks <address@hidden> writes:
>> (*) Programming of an AVR in a JTAG chain isn't possible, right?!
Steve> It's certainly supposed to work, but see my earlier posts on a
Steve> really bad experience I had before you try it. I'll not bring
Steve> the details up again for fear people will believe I'm disparaging
Steve> my favorite processor.
The ability to program parts in a JTAG chain downstream of an AVR depends on
the AVR Chip revision. See the datasheet and the errata, but don't expect
clean words about the chip revision when the bug was fixed.
With recent chips it can be done:
> detectchain -c ftdi -t ikda
JTAG loc.: 0 IDCODE: 0x0978103f Desc: AT90CAN128 IR length: 4
JTAG loc.: 1 IDCODE: 0x05046093 Desc: XCF04S IR length: 8
JTAG loc.: 2 IDCODE: 0x41c22093 Desc: XC3S500E IR length: 6
--
Uwe Bonnes address@hidden
Institut fuer Kernphysik Schlossgartenstrasse 9 64289 Darmstadt
--------- Tel. 06151 162516 -------- Fax. 06151 164321 ----------