Lpc2000

--- In lpc2000@yahoogroups.com, "roland_winistoerfer" <roland.
winistoerfer@w...> wrote:
> --- In lpc2000@yahoogroups.com, "embeddedjanitor" <manningc2@a...> 
> wrote:
> > 
> > The RTCK is used to synchonise devices with a slow clock. 
> > I'm quite suprised that the use of RTCK is not optional on the 
JEENI 
> > because quite a few devices do not support it.
> > 
> > The LPC210x has RTCK output on pin 26. Attach this to the JEENI's 
> RTCK 
> > input and try that out.
> > 
> > -- CHarles
> 
> Unfortunately, the JEENI does not support the RTCK signal, so it is 
> not possible to connect to it.
> I also checked the connection of the JTAG on several other 
schematics 
> on the net and mostly they to not use the RTCK signal.
> 
> Any other suggestion ?
> 
> Wini

Suggestion: Slow your JTAG clock down.

The JTAG clock must not be faster than 1/6 of the core clock 
frequency. So, if you're running from a 10MHz crystal, and the PLL has 
not been set up yet, then don't run the JTAG clock any faster than 
1MHz.

-- Charles