參數(shù)資料
型號: DS21552L
廠商: Maxim Integrated Products
文件頁數(shù): 102/137頁
文件大?。?/td> 0K
描述: IC TXRX T1 1-CHIP 5V 100-LQFP
產(chǎn)品培訓(xùn)模塊: Lead (SnPb) Finish for COTS
產(chǎn)品變化通告: Product Discontinuation 20/Feb/2012
標(biāo)準(zhǔn)包裝: 90
功能: 單芯片收發(fā)器
接口: E1,HDLC,J1,T1
電路數(shù): 1
電源電壓: 4.75 V ~ 5.25 V
電流 - 電源: 75mA
工作溫度: 0°C ~ 70°C
安裝類型: 表面貼裝
封裝/外殼: 100-LQFP
供應(yīng)商設(shè)備封裝: 100-LQFP(14x14)
包裝: 托盤
包括: DSX-1 和 CSU 線路補(bǔ)償發(fā)生器,HDLC 控制器,帶內(nèi)回路代碼發(fā)生器和檢測器
DS21352/DS21552
67 of 137
Firmware,
which
can
be
retrieved
from
the
Web
site
(www.dalsemi.com/Prod_info
/Telecom/t1_e1_tools.html), was developed to implement the FDL.
The code for the DS2151
incorporates the LAPD protocol and can be used with any of the 51/52/352/552 SCTs. The code for the
DS2152 can be used with the 52/352/552 SCTs.
15.3 HDLC AND BOC CONTROLLER FOR THE FDL
15.3.1 GENERAL OVERVIEW
The device contains a complete HDLC controller with 64–byte buffers in both the transmit and receive
directions as well as separate dedicated hardware for Bit Oriented Codes (BOC). The HDLC controller
performs all the necessary overhead for generating and receiving Performance Report Messages (PRM)
as described in ANSI T1.403 and the messages as described in AT&T TR54016. The HDLC controller
automatically generates and detects flags, generates and checks the CRC check sum, generates and
detects abort sequences, stuffs and destuffs zeros (for transparency), and byte aligns to the FDL data
stream. The 64–byte buffers in the HDLC controller are large enough to allow a full PRM to be received
or transmitted without host intervention. The BOC controller will automatically detect incoming BOC
sequences and alert the host. When the BOC ceases, the device will also alert the host. The user can set
the device up to send any of the possible 6–bit BOC codes.
There are thirteen registers that the host will use to operate and control the operation of the HDLC and
BOC controllers. A brief description of the registers is shown in Table 15-2.
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DS21554 制造商:Maxim Integrated Products 功能描述: