參數(shù)資料
型號: CD1284
廠商: Intel Corp.
英文描述: IEEE 1284-Compatible Parallel Interface Controller with Two High-Speed Asynchronous Serial Ports
中文描述: 符合IEEE 1284兼容并行接口控制器兩個(gè)高速異步串行端口
文件頁數(shù): 126/176頁
文件大?。?/td> 2255K
代理商: CD1284
CD1284
IEEE 1284-Compatible Parallel Interface Controller
126
Datasheet
7.4.4
Channel Option Register 4
5
Flow Control Transparency:
This bit enables/disables the transparent response to flow control characters
received by the CD1284. If set, received XON and XOFF characters are not placed in the FIFO for the host. If
in-band flow control is enabled, the characters are acted upon. If this bit is not set, flow control characters are
acted upon, placed in the receive FIFO, and the host is notified by a receive exception service request.
4
Enable Special Character Detect on SCHR2 and SCHR1:
This bit controls whether or not the CD1284
compares received characters with the values stored in SCHR2 and SCHR1.
1
enables compare. This bit
must be set to enable automatic in-band flow control.
3:0
Serial Receive FIFO Threshold
Register Name: COR4
Register Description: Channel Option Register 4
Access: Read/Write
Bit 7
Bit 6
IGNCR
ICRNL
8-Bit Hex Address: 1E
Default Value: 00
Bit 5
INLCR
Bit 4
IGNBRK
Bit 3
Bit 2
PEH[2]
Bit 1
PEH[1]
Bit 0
PEH[0]
BRKINT
Bit
Description
RxTh3
RxTh2
RxTh1
RxTh0
Receiver FIFO Threshold
0
0
0
0
Not used.
0
0
0
1
1 character
0
0
1
0
2 characters
1
0
1
1
11 characters
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