XRT79L71 datasheet(59/109 Pages) EXAR

59 / 109 page

XRT79L71

REV. 1.0.0

1-CHANNEL DS3/E3 ATM UNI/PPP/CLEAR-CHANNEL FRAMER IC - HARDWARE

3.0

1.0.0BRIEF XRT79L71 ARCHITECTURE DESCRIPTION

The XRT79L71 can be configured to operate in any of the following modes.

• The Clear-Channel DS3/E3 Framer Mode

• The High-Speed HDLC Controller over DS3/E3 Mode

• The ATM UNI over DS3/E3 Mode

• The PPP over DS3/E3 Mode

The detailed functional description of the XRT79L71, that covers these four modes of operation, can be found

in various documents as presented below in Table 2.

If the user intends to operate the XRT79L71 in a particular mode, then the user should obtain the appropriate

document, which is presented in Table 2.

However, a brief functional/architectural description of the

XRT79L71, when it is configured to operate in any of these modes will be presented below.

BRIEF FUNCTIONAL ARCHITECTURE DESCRIPTION OF THE XRT79L71 - CLEAR-CHANNEL DS3/E3

FRAMER MODE

If the XRT79L71 has been configured to operate in the Clear-Channel DS3/E3 Framer Mode, then it will have

the Functional Architecture as is presented below in Figure 2.

TABLE 2: LISTING OF ARCHITECTURAL/FUNCTIONAL DESCRIPTION DOCUMENTS FOR THE XRT79L71

MODE OF OPERATION

ARCHITECTURAL/FUNCTIONAL DESCRIPTION DOCUMENT

DS3/E3 Clear-Channel Framer Mode

79L71_Arch_Descr_CC.pdf

Architectural/Functional Description of the XRT79L71 1-Channel DS3/E3 ATM

UNI/PPP/Clear-Channel with LIU IC - Clear-Channel AND High Speed HDLC

Controller Mode Applications.Framer Applications

DS3/E3 ATM UNI Mode

79L71_Arch_Descr_ATM.pdf

Architectural/Functional Description of the XRT79L71 1-Channel DS3/E3 ATM

UNI/PPP/Clear-Channel Framer with LIU IC - ATM UNI Mode Applications.

DS3/E3 PPP Mode

79L71_Arch_Descr_PPP.pdf

Architectural/Functional Description of the XRT79L71 1-Channel DS3/E3 ATM

UNI/PPP/Clear-Channel Framer with LIU IC - ATM Mode Applications

XRT79L71 Datasheet(PDF) 59 Page - Exar Corporation