Electronic Components Datasheet Search
  English  ▼

X  

Preview PDF HTML

XRT7250 Datasheet(PDF) 201 Page - Exar Corporation

Part # XRT7250
Description  DS3/E3 FRAMER IC
PDF  463 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Manufacturer  EXAR [Exar Corporation]
Direct Link  http://www.exar.com
Logo EXAR - Exar Corporation

XRT7250 Datasheet(HTML) 201 Page - Exar Corporation

Back Button XRT7250 Datasheet HTML 197Page - Exar Corporation XRT7250 Datasheet HTML 198Page - Exar Corporation XRT7250 Datasheet HTML 199Page - Exar Corporation XRT7250 Datasheet HTML 200Page - Exar Corporation XRT7250 Datasheet HTML 201Page - Exar Corporation XRT7250 Datasheet HTML 202Page - Exar Corporation XRT7250 Datasheet HTML 203Page - Exar Corporation XRT7250 Datasheet HTML 204Page - Exar Corporation XRT7250 Datasheet HTML 205Page - Exar Corporation Next Button
Zoom Inzoom in Zoom Outzoom out
 201 / 463 page
background image
XRT7250
DS3/E3 FRAMER IC
áç
áç
áç
áç
REV. 1.1.1
182
The purpose of this interrupt is to alert the Microcon-
troller/MIcroprocessor that the LAPD Transmitter has
completed its transmission of a given LAPD (or PM-
DL) Message, and is now ready to transmit the next
PMDL Message, to the Remote Terminal Equipment.
4.3
THE RECEIVE SECTION OF THE XRT7250 (DS3
MODE OPERATION)
When the XRT7250 has been configured to operate
in the DS3 Mode, the Receive Section of the
XRT7250 consists of the following functional blocks.
• Receive LIU Interface block
• Receive HDLC Controller block
• Receive DS3 Framer block
• Receive Overhead Data Output Interface block
• Receive Payload Data Output Interface block
Figure 72 presents a simple illustration of the Receive
Section of the XRT7250 Framer IC.
Each of these functional blocks will be discussed in
detail in this document.
4.3.1
The Receive DS3 LIU Interface Block
The purpose of the Receive DS3 LIU Interface block
is two-fold:
TXDS3 LAPD STATUS AND INTERRUPT REGISTER (ADDRESS = 0X34)
BIT 7BIT 6BIT 5BIT 4BIT 3BIT 2BIT 1BIT 0
Not Used
TxDL Start
TxDL Busy
TxLAPD
Interrupt
Enable
TxLAPD
Interrupt
Status
RO
RO
RO
RO
R/W
RO
R/W
RUR
00
000
001
FIGURE 72. A SIMPLE ILLUSTRATION OF THE RECEIVE SECTION OF THE XRT7250, WHEN IT HAS BEEN CONFIGURED
TO OPERATE IN THE
DS3 MODE
Receive Payload
Data Input
Interface Block
Receive DS3/E3
Framer Block
Receive LIU
Interface
Block
RxSer
RxNib[3:0]
RxClk
RxPOS
RxNEG
RxLineClk
Receive Overhead
Input
Interface Block
RxOHClk
RxOHInd
RxOH
RxOHEnable
RxOHFrame
RxFrame
Rx DS3 HDLC
Controller/Buffer
Rx DS3 HDLC
Controller/Buffer
From Microprocessor
Interface Block



Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100  ...More


Datasheet Download

Go To PDF Page


Link URL



Does ALLDATASHEET help your business so far?  [ DONATE ] 

About Alldatasheet   |   Advertisement   |   Contact us   |   Privacy Policy   |   Link to Datasheet    |   Link Exchange   |   Manufacturer List
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com