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User’s Guide 21020285 D
Chapter 2 Hardware Essentials
Hardware Ports: General Page 2 - 7
Channel Attention Port - The Channel Attention Port is your means of
informing the RF3880 adapter that a command is ready to be executed. The
value you write to this port tells the adapter what kind of Command Structure
to expect. Before you write to the Channel Attention Port you must set-up the
appropriate Command Structure in the system memory space you will be
directing the adapter to read.
Status Port - This port is used to read status from the adapter. There are two
types of status that can be read: General Status—returned after a command
completes during normal operation; and Reset Status—returned during board
self-test at reset or power-up.
Reset Port - With the Reset Port you are able to initiate, through software, a
reset identical to a hardware reset.