XRT79L71_10 View Datasheet(PDF) - Exar Corporation
Part Name
Description
MFG CO.
'XRT79L71_10' PDF : 609 Pages View PDF
PRELIMINARY
XRT79L71
REV. P2.0.0
1-CHANNEL DS3/E3 CLEAR-CHANNEL FRAMERLIU COMBO - CC/HDLC ARCHITECTURE
1.3 BRIEF FUNCTIONAL/ARCHITECTURAL DESCRIPTION OF THE XRT79L71 - ATM UNI OVER
DS3/E3 MODE
If the XRT79L71 has been configured to operate in the ATM UNI over DS3/E3 Mode, then it will have the
Functional Architecture as is presented below in Figure 4.
FIGURE 4. THE FUNCTIONAL BLOCK DIAGRAM OF THE XRT79L71 WHEN IT HAS BEEN CONFIGURED TO OPERATE IN
THE ATM UNI OVER DS3/E3 MODE
Tx PLCP Processor Block
Can be by-passed for “Direct-Mapped”
ATM Applications
TTxx
UUTTOOPPIAIA
InInteterrfafaccee
BBlolocckk
TTx x AATTMM
CCeellll
PPrroocceesssosorr
BBlolocckk
TTx x PPLLCCPP
PPrroocceesssosorr
BBlolocckk
TTxxDDSS33/E/E33
FFrraammeerr
BBlolocckk
DDSS33/E/E33
JJititteterr
AAtttetennuuaatotorr
BBlolocckk
TTxxDDSS33/E/E33
LLIUIU
BBlolocckk
RRxx
UUTTOOPPIAIA
InInteterrfafaccee
BBlolocckk
RRx x AATTMM
CCeellll
PPrroocceesssosorr
BBlolocckk
RRx x PPLLCCPP
PPrroocceesssosorr
BBlolocckk
Rx PLCP Processor Block
Can be by-passed for “Direct-Mapped”
ATM Applications
RRxxDDSS33/E/E33
FFrraammeerr
BBlolocckk
DDSS33/E/E33
JJititteterr
AAtttetennuuaatotorr
BBlolocckk
RRxxDDSS33/E/E33
LLIUIU
BBlolocckk
Only one JA exists.
Can be configured in
Tx or Rx Path
Figure 4 indicates that the XRT79L71 consists of the following functional blocks.
The Transmit UTOPIA Interface Block
The Transmit Overhead Data Input Interface Block
The Transmit ATM Cell Processor Block
The Transmit FEAC Controller Block (DS3 C-bit Parity Applications Only)
The Transmit Trail-Trace Message Controller Block (E3, ITU-T G.832 Applications Only)
The Transmit SSM Controller Block (E3, ITU-T G.832 Appications Only)
The Transmit LAPD Controller Block
The Transmit PLCP Processor Block
The Transmit DS3/E3 Framer Block
The Transmit DS3/E3 LIU Block
The Receive DS3/E3 LIU Block
The Receive DS3/E3 Framer Block
The Receive PLCP Processor Block
The Receive LAPD Controller Block
The Receive SSM Controller Block (E3, ITU-T G.832 Applications Only)
14
Share Link: 
