參數(shù)資料
型號: CD1865
廠商: Intel Corp.
英文描述: Intelligent Eight-Channel Communications Controller
中文描述: 智能八通道通信控制器
文件頁數(shù): 107/150頁
文件大?。?/td> 871K
代理商: CD1865
Intelligent Eight-Channel Communications Controller
CD1865
Datasheet
107
9.2.3.8
Channel Access Register
This register contains the channel number used for channel-oriented host read or write operations
when the host is not in a service request service routine. When the CD1865 and the host are in a
service request routine, the CD1865 supplies the service-requesting channel number by the Global
Interrupting Channel register. The Channel Access register contents are not used during service
request. The host service request routine is restricted to accessing only the register set of the
service-requesting channel and the Global registers.
The Channel Access register is used by the host when the host is setting up or modifying the
configuration of the channel. It is also used to issue certain channel-specific commands such as
sending a flow-control character.
Bit
Description
Bits 7:5
User-defined
Bits 4:2
Defines the service requesting channel number.
Bits 1:0
User-defined
Register Name:
Register Description: Channel Access Register
Default Value: 0
Access: Read/Write
Bit 7
Bit 6
8-Bit Hex Address: $64
Intel Hex Address: $C8
Motorola Hex Address: $C9
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Reserved
A7(0)
C2
C1
C0
C2
C1
C0
Channel Number
0
0
0
Channel 0
0
0
1
Channel 1
0
1
0
Channel 2
0
1
1
Channel 3
1
0
0
Channel 4
1
0
1
Channel 5
1
1
0
Channel 6
1
1
1
Channel 7
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