參數(shù)資料
型號(hào): SCD243110QCD
廠商: INTEL CORP
元件分類: 微控制器/微處理器
英文描述: 4 CHANNEL(S), 134.4K bps, SERIAL COMM CONTROLLER, PQFP100
封裝: METRIC, QFP-100
文件頁(yè)數(shù): 7/186頁(yè)
文件大?。?/td> 2204K
代理商: SCD243110QCD
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CD2431 — Advanced Multi-Protocol Communications Controller
104
Datasheet
7-bit characters. IStrip is applied after all other character processing, but before spe-
cial character processing.
Bit 6
LNext
This bit enables the LNext option
0 = all receive characters are processed for special character detection.
1 = the character following the LNext character is not processed for special character
matching or flow control.
This provides a mechanism to transfer flow control and special characters as normal
data, without invoking flow control action in the CD2431, and without generating
special interrupts. The LNext character is defined in the LNXT register, and when
processed, is always passed to the host CPU as normal data.
Bit 5
Flow control on error characters
0 = characters received with an error are not processed for special character/flow
control matching.
1 = all receive characters, even those with errors, are processed for special character/
flow control processing.
Bits 4:2
Reserved – must be ‘0’.
Bits 1:0
Transmit processing for CR and NL
These bits define the Translation mode when CR and/or NL are present in the trans-
mit data.
8.2.9
Special Character Registers — Async Modes Only
Special Character registers can be used for detecting specific receive characters in the incoming
data stream, and can be used to transmit character (by STCR) preempting any data in the transmit
FIFO.
8.2.9.1
Special Character Register 1 (SCHR1)
ONLCR
OCRNL
0
No special action.
0
1
CR translated to NL.
1
0
NL translated to the sequence CR NL.
11
CR translated to NL and NL translated to the
sequence CR NL.
Register Name: SCHR1
Register Description: Special Character 2
Default Value: x’00
Access: Byte Read/Write
Intel Hex Address: x’1C
Motorola Hex Address: x’1F
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
User-defined Special Character,
protcol-defined Special Characters (see below).
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