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)： 127/176頁
文件大?。?/td> 2255K
代理商： CD1284
IEEE 1284-Compatible Parallel Interface Controller
—
CD1284
Datasheet
127
Bit
Description
7:5
Carriage Return (CR) and New Line (NL) Processing:
These three bits define the way that the CD1284
processes received CR and NL characters (x
’
0D and x
’
0A). The following table shows the actions performed:
4:3
Break Processing:
The CD1284 can handle received break characters in three ways:
2:0
Parity (P), Framing (F), and Overrun (O) Error Special Processing:
As with break characters, the CD1284
can treat error characters in several different ways, if enabled:
IGNCR
ICRNL
INLCR
Action
0
0
0
No action.
0
0
1
Received NL changed to CR.
0
1
0
Received CR changed to NL.
0
1
1
Received CR changed to NL; NL changed to CR.
1
0
0
Received CR discarded.
1
0
1
Received CR discarded; NL changed to CR.
1
1
0
Received CR discarded.
1
1
1
Received CR discarded; NL changed to CR.
IGNBRK
BRKINT
Break Action
0
0
Received break generates an exception service request. End-
of-Break also generates an exception service request if EBD is
enabled in COR5.
0
1
Received break treated as a good NULL character.
1
0
Not used.
1
1
Received break discarded.
PEH[2]
PEH[1]
PEH[0]
Action
0
0
0
Received P/F/O error characters treated as exception data.
0
0
1
Received P/F/O error characters treated as good data.
0
1
0
Received P/F/O error characters discarded.
0
1
1
Received P/F/O error characters replaced with good NULL
characters.
1
0
0
Received P/F/O error characters are replaced with the two
character sequence x
’
FF-NULL-character. Good x
’
FF
characters are replaced with the two character sequence
x
’
FF-x
’
FF.
1
0
1
Not used.
1
1
0
1
1
1
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