Lpc2000

Hello!

I would like to connect several P89LPC932 (x51 core) slaves to single 
LPC2xxx master. Each slave has unused SPI and UART, which can be used 
for this communication. One slave is addressed at once.

What would be best solution for that? I think SPI is ideal for that. I 
could use free port pins for slave selects. Is there any other (more 
scalable) option without external/additional components? How many slaves 
can I connect to single master to avoid port overloading? Data transfer 
rate is very low (~100 bytes/s per slave) and distance between master 
and slaves is <1m.

Any further suggestions or tips&tricks?

M.