Ciprico Rimfire 3880 用户手册

There are four ports that are used to communicate with the RF3880 adapter: 
Address Buffer Port; Channel Attention Port; Status Port; and Reset Port. The 
address and function of each port is described in this section.

Each of the Hardware ports can be addressed as an offset from the base address, 
(which is set with jumpers on the board). Further, all ports can be accessed in 
16-bit mode. To address a specific port you must add the correct offset to the 
base address value. The offset values for the RF3880 hardware ports are 
described in the figure below.

 - Using the factory set Base Address for the 

RF3880, EE00H, the Hardware Port Addresses would be:

Address Port = EE00H
Channel Attention Port = EE08H
Status Port = EE10H
Reset Port = EE18H

The table above also indicates how each port can be accessed by the Host: read 
or write.

An overview of the operation of all of the Hardware Ports is provided next. The 
overview is followed by a detailed description of each Hardware Port that 
focuses on the rules of operation.

 - This port is instrumental in setting up the RF3880 

adapter I/O operation. With it you can do two things:

1.

Set system bus transfer characteristics such as bus width and byte/word 
swapping for subsequent operations. Usually this is done only with the 
first command sent to the board, when you are initializing the board for 
operation in your system.

2.

Pass the address of a Single Command Structure to the adapter. Any 
time you wish to issue a Single Command, you must use the Address 
Buffer Port to pass the address structure. Most often, the first Single 
Command executed contains a command to Start Command List. This 
function of the port is only used when issuing a Single Command.

Port

Address Offset

Host Read or Write

Address Buffer

00H

Write

Channel Attention

08H

Write

Status

10H

Read

Reset

18H

Write