Lpc2000

Hi Gennady,

that has changed in deed, the ports are no longer connected to the VPB
bus, not even to AHB but to the memory bus, which is even faster than
the AHB connected ports. 

Bob

--- In lpc2000@yahoogroups.com, "Gennady Palitsky" <gennadyp@j...> wrote:
> Thanks Bob,
> 
> > Hi,
> >
> > the LPC2148 (LPC2138 with USB) has fast I/O.  In an assemler test
> > program we were able to switch the ports with a frequency of CPU/4,
> > ergo 15 MHz.
> >
> 
> I believe it's not the actual IO toggle speed, but moving of data
from from 
> flash to IO (VPB related?) that took extra cycles on 'before 2148' 
> controllers. Loading consecutive data from flash and storing at a
port took 
> 10 cycles.
> Is this changed on the 2148?
> 
> Gennady