AVR-Chat

Hello

From the manual of ATMEGA128 i gather that general
purpose IO can be used as as SS (Slave Select pin). 

I only see one dedicated SS pin = pin 10 (PB0) in the
data sheet. 

--How does the SPI module know which are the other SS
Pins that i have connected as SS to the slaves?

--So does this mean that the CPU has to be involved in
a multi slave situation. as it shall have to pull the
SS for the slaves low ? 

--How many slaves can i connect to a single Atmega128?

--What is the maximum bit rate of communication
assuming that i am using a 16Mhz Xtal?

Thankyou


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