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
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Re: [lpc2000] Re: fast io philips ?
2005-07-19 by Gennady Palitsky