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SCD1284 bảng dữ liệu(PDF) 126 Page - Intel Corporation

tên linh kiện SCD1284
Giải thích chi tiết về linh kiện  IEEE 1284-Compatible Parallel Interface Controller with Two High-Speed Asynchronous Serial Ports
PDF  176 Pages
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nhà sản xuất  INTEL [Intel Corporation]
Trang chủ  http://www.intel.com
Logo INTEL - Intel Corporation

SCD1284 bảng dữ liệu(HTML) 126 Page - Intel Corporation

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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
8-Bit Hex Address: 1E
Default Value: 00
Bit 7Bit 6Bit 5Bit 4Bit 3
Bit 2Bit 1
Bit 0
IGNCR
ICRNL
INLCR
IGNBRK
−BRKINT
PEH[2]
PEH[1]
PEH[0]
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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