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Interface LPC2106 to PCMCIA card

2004-04-30 by cpexed

I want to attempt to interface a LPC2106 to a PCMCIA wireless network
card (PRISM based chipset, using linux drivers as refrence).

As far as hardware goes what options would be best.
I have several PCF8575 chips, these are 16 bit IO expanders for the
I2C bus. Using four of these i can have 64 IO bits accessible via I2C,
problem is they are surface mount and will be a pain in the butt to
mount on a board (I am a student and have limited soldering equipment
and expereince and buget for that matter). Or I can use one or two of
these or 8 (maybe even 16 but i dont know if i got that to spare) bits
straight from the LPC2106 and several latches to build up enough bits
to control the card. But that seems messy to me.

My other option i am considering is a CPLD or an FPGA which will drive
the pcmcia card, my main concern with this is for my project I already
have maxed out my budget and dont want to fork over for another
development board. And since I am have never worked with programmable
logic devices I am scared just to buy a chip and try to mount it on a
board (see earlier concerns about my soldering skills)

I am also on a very tight development schedule I need a working
prototype in 5 weeks.

I also do not have the specs for the pcmcia bus and they want lots of
money for them. can anyone give me any basic timing information like
how long signals need to be available and such. I will try to track
down some datasheets to get this info.

Is it possible to operate a prism based card in 8bit mode? will I need
all the address lines?

At this point i am not concerned about sending data over a wireless
network, just want to be able to view availble networks and statistics.

zworld has a rabbit uC controlling a wireless card and doesnt seem to
use any special hardware but at a cost of $300, i want to do this for
much cheaper.

Thanks for any help advice warnings etc

Josiah Vivona

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