[DSP-10] U107 Voltages

[Yamamoto Jiro]

I took traces of serial bus signals for both cases using with my scope 
(analog and logical). I published the result at 
<http://bagdad-cafe.homedns.org/dsp10/traces.html>. It seems to be 
sensitive to some factors (clock frequency, signal waveform or 
something else???) whether in cascading U107 the serial data is high 
level or not when the serial clock rises. Is it possible to think that 
this causes the different result...

Regards,
Jiro JQ2LMG

On Thu, 26 Feb 2004 20:08:19 +0900, Yamamoto Jiro wrote:
> Thanks Bob,
> 
>>  It seems puzzling why the UDIAG2.EXE and UHFA driven programming 
>>  would be different. When you run UHFA , do you get the incorrect U108 
>>  outputs, or is it just U107?  The programming from UHFA consists of 
>>  sending the value for U107, U108 and the 126 MHz PLL to the DSP and 
>>  the actual programming is done as part of the interrupt processing. 
>>  With UDIAG2 it is much simpler, but the end results should be the 
>>  same !!
> 
> When UHFA.EXE is running, U108 is correct, which voltage outputs are 
> exactly same as when UDIAG2.EXE. Only U107 voltages are offset by 1. 
> Very strange... 
> 
>>   When I get a chance, I will look at he differences between the two 
>>  programs. For now, it would be helpful to see that the U108 voltage 
>>  outputs are also offset by 1 position.
>>  
>>  Your other IC voltages seem OK, although the Lock Detect is obviously 
>>  unlocked, as you have observed. The first step would seem to be 
>>  getting the serial programming to work.
> 
> Ok, I hope I could get it to work.
> 
> - Jiro, JQ2LMG
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