The next three significant bits address a particular device
or memory page (page = 256 bytes of memory). A system
could have up to eight PCF8582C-2 (or four PCF8594C-
containing two memory pages each or two PCF8598C-
containing four memory pages each, respectively) devices
on the bus. The eight addresses are defined by the state
of the A0, A1 and A2 inputs.
The last bit of the slave address defines the operation to
be performed. When set to logic 1 a read operation is
selected.
Address bits must be connected to either VDD or VSS.
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