Lpc2000

--- In lpc2000@yahoogroups.com, Robert Wood <robert.wood@...> wrote:
>
>  >> Closer inspection reveals to me that the Minimum Voltage for the 
> VccIO and VccA pins on the 2103 is 3.0V.  How disappointing - a tiny 
> chip and I have to run a split supply just to get it to boot?  Anyone 
> done the unthinkable and tried to run the whole works off of 1.8V?  And 
> here I wanted to replace all my 8-bit uC's with the 2103 ever
after... <<
> 
> The other thing that puts me off using the 210x rather than, say, AVRs 
> is the fact that you only have one 32 bit port. I'd much rather use an 
> ATMega that has multiple ports. Too much bit shifting going on with the 
> ARM for me.
>

I certainly like the ATmega128 but it isn't even close in speed to the
LPC2106.  It doesn't have as much SRAM either.

The ARM7TDMI-S has a 32 bit barrel shifter.  I don't think shifting
things around is much of an issue.

One downside of the 32 bit instruction (ARM mode) is that it chews up
the 128k bytes in a hurry.  The other side is that many instructions
are conditional so small branches aren't required.

There's good and bad in every device.  It's always a question when I
start a new project; which device to use.  I like the 5V inteface
levels of the AVR, I like the speed of the LPC, I think I would really
like the LPC2138 with the A/D converter and single supply, if I have
the pins left over I like using Rowley CrossConnect to do JTAG on the
LPC but I'm ok with ISP for either device and the LPC has more SRAM. 
Always choices...

Richard