參數(shù)資料
型號: XRT86VL3x
廠商: Exar Corporation
元件分類: 通信及網(wǎng)絡(luò)
英文描述: Ultraframer DS3/E3/DS2/E2/DS1/E1/DS0
中文描述: Ultraframer DS3/E3/DS2/E2/DS1/E1/DS0
文件頁數(shù): 30/153頁
文件大?。?/td> 1316K
代理商: XRT86VL3X
XRT86VL3X
23
T1/E1/J1 FRAMER/LIU COMBO - ARCHITECTURE DESCRIPTION
REV. 1.2.2
3.3
Programming Sequence for Receiving LAPD Messages
The XRT86VL3x can extract data link information from incoming DS1 frames from either the datalink bits
themselves or the D/E time slots within the PCM input data. To extract a LAPD message, the following
programming sequence can be used as a reference.
F
IGURE
31. R
ECEIVING
HDLC M
ESSAGES
Enable RxSOT, RxEOT, and
RxIDLE
RxSOT Indicates a Start of a
New Message, go to Next
Step
Wait for RxEOT or RxIDLE
If INT = RxIDLE
Read RxBYTE Count
Register to Determine
Available Buffer
Read the Buffer to Retrieve
the Message
Read RxBYTE Count
Register to Determine
Available Buffer
Read the Buffer to Retrieve
the Message
YES, RxIDLE
NO, RxEOT
相關(guān)PDF資料
PDF描述
XRT86VL3X_07 Ultraframer DS3/E3/DS2/E2/DS1/E1/DS0
XRT86VL3X Ultraframer DS3/E3/DS2/E2/DS1/E1/DS0
XRT91L30_0611 STS-12/STM-4 OR STS-3/STM-1 SONET/SDH TRANSCEIVER
XRT91L306 STS-12/STM-4 OR STS-3/STM-1 SONET/SDH TRANSCEIVER
XRT91L30IQ STS-12/STM-4 OR STS-3/STM-1 SONET/SDH TRANSCEIVER
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