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Re: [avr-gcc-list] jtagice and stk500 protocol docs
From: |
Karl Ran |
Subject: |
Re: [avr-gcc-list] jtagice and stk500 protocol docs |
Date: |
Tue, 08 Oct 2002 23:20:26 +0000 |
Hi Armand,
Here are my results :
Just for the record: Do you know the FW-version of your Atmel box?
On chip debug state change (T) DR/IR state (T)
communication freq.
according to Atmel
125 KHz 8.5 10 - 12
OK - lets do some math:
RAW worst-case bitrate would be:
1/8.5E-6 * 3 = 353 kbit/s (3 signals: TMS, TDI, TDO)
Thats more than 92 kbit/s (115.2 / 10 * 8)
So, we _have_ to either use another interface or do some data processing in
the JTAG-sniffer chip.(to reduce the bitrate)
Or we hope that the effective JTAG data-rate is low enough to buffer some
bits in the on-chip SRAM...
Any opinions or comments?
Hope this helps ...
Yes it helps - thanks Armand!
Karl
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- [avr-gcc-list] Re: [Uisp-dev] jtagice and stk500 protocol docs, (continued)
- [avr-gcc-list] Re: [Uisp-dev] jtagice and stk500 protocol docs, Jason Kyle, 2002/10/02
- [avr-gcc-list] Re: [Uisp-dev] jtagice and stk500 protocol docs, Theodore A. Roth, 2002/10/02
- Re: [avr-gcc-list] jtagice and stk500 protocol docs, Jesper Hansen, 2002/10/10
- Re: [avr-gcc-list] jtagice and stk500 protocol docs, Karl Ran, 2002/10/10
- Re: [avr-gcc-list] jtagice and stk500 protocol docs, Karl Ran, 2002/10/10
- Re: [avr-gcc-list] jtagice and stk500 protocol docs,
Karl Ran <=
- Re: [avr-gcc-list] jtagice and stk500 protocol docs, Karl Ran, 2002/10/11