Lpc2000

--- In lpc2000@yahoogroups.com, "skykotech" <rick@s...> wrote:
> I just recieved 3 pieces of the LPC2214FBD144 (144 pin part) from 
> philips as samples.  I was working on a rather complicated atmel 
> AT91RM9200 design with all the bells and whistles, but since these 
> parts arrived so quickly, I am considering putting that design on 
> hold for a bit and getting something actually working by using the 
> LPC2214.  Just to get something going, I am considering stripping
my 
> design down to the following:

Are they making the 2214?  What did you have to do to get a sample? 
Do you have any idea when it will be in production?  If this will be
in production anytime in the next three months, I will seriously
consider them vs. the OKI parts I am planning to use. 

 
> LPC2214FBD144
> 2 channel 16 bit DAC on SPI #1
> 8 channel 8 bit DAC on SPI #2
> 16 bit compact flash connector interface on the external memory 
> controller
> RS485 level converter on UART0
> RS232 level converter on UART1
> output buffers for DACS (+/-10 volts on the 16 bit DACS, 0-5 volts
on 
> the 8 bit, unless I find a 8 channel 8 bit dac with 0-5 volt
buffers 
> built in)
> Simple linear voltage regulators
> 
> To keep things as simple as possible, I will supply regulated 5V
and 
> +/- 12V externally, and use onboard 1.8v,3.3v,10v,-10v linear 
> regulators.  I will bring out the rest of the IO to .1 inch
headers, 
> and also perhaps the address/data bus to .1 inch headers for 
> experiments.
> 
> Do you think this simple design is remotely possible on a 2 layer 
> board?  I would love to keep it at two layers for cost reasons.

Yes, I don't think the part will be hard to route on a two layer board
if you don't mind it using a lot of space for vias.  The OKI eval
board I am using only has two layers for signals and most of them run
very directly from chip to chip because they left tons of space
between them.  

Just use fat power traces and a lot of decoupling caps (one for each
power pin) right next to the Vdd pin with the shortest possible path
to a GND pin on the chip.