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): 118/150頁
文件大?。?/td> 871K
代理商: CD1865
CD1865
Intelligent Eight-Channel Communications Controller
118
Datasheet
9.4.6
Channel Control Status Register
This Status register stores the current state of the channel. It may be read by the host at any time. If
the host determines that a flow-control state is inappropriate, it may be cleared by enabling or
disabling the transmitter or receiver by CCR command.
Bit
Description
Bit 7
Xon Character Definition:
0 = Xon Character is a single-character code, and it is defined by Special Character.
1 = Xon Character is a double-character sequence, and it is defined by Special Characters 1 and 3.
Bit 6
Xoff Character Definition:
0 = Xoff Character is a single-character code, and it is defined by Special Character 2.
1 = Xoff Character is a double-character sequence, and it is defined by Special Characters 2 and 4.
Bit 5
Flow-Control Transparency (FCT) Mode:
0 = Flow-control characters received are given to the host by Receive Exception Service Requests.
1 = Flow-control characters received are not given to the host by Receive Exception Service Requests.
Bit 4
Special-Character Detection Enable:
0 = Special-Character Status detection is disabled.
1 = Special-Character Status detection is enabled.
Bits 3:0
RxFIFO Threshold:
Register Name: CCSR
Register Description: Channel Control Status Register
Default Value: 0
Access: Read Only
Bit 7
Bit 6
8-Bit Hex Address: $06
Intel Hex Address: $0C
Motorola Hex Address: $0D
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
RxEN
RxFloff
RxFlon
N/U
TxEN
TxFloff
TxFlon
N/U
RxTh3
RxTh2
RxTh1
RxTH0
Status
0
0
0
0
Do not use
0
0
0
1
1 character
0
0
1
0
2 characters
0
0
1
1
3 characters
0
1
0
0
4 characters
0
1
0
1
5 characters
0
1
1
0
6 characters
0
1
1
1
7 characters
1
0
0
0
8 characters
1001 to 1111
Reserved, do not use.
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