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UPD98402A

NEC
Part Number UPD98402A
Manufacturer NEC
Description LOCAL ATM SONET FRAMER
Published Apr 16, 2005
Detailed Description DATA SHEET MOS INTEGRATED CIRCUIT µPD98402A LOCAL ATM SONET FRAMER The µPD98402A is one of the ATM-LAN LSIs and incor...
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UPD98402A
UPD98402A

Overview
DATA SHEET MOS INTEGRATED CIRCUIT µPD98402A LOCAL ATM SONET FRAMER The µPD98402A is one of the ATM-LAN LSIs and incorporates the TC sublayer function in the SONET/SDHbased physical layer of the ATM protocol.
The main functions of the µPD98402A include a transmit function for mapping ATM cells received from the ATM layer onto the payload block of the SONET STS-3c/SDH STM-1 frame and sending them to PMD (Physical Media Dependent) in the physical layer, and a receive function for separating the overhead block and ATM cells from the data string received from the PMD sublayer and sending the ATM cells to the ATM layer.
Futhermore, the µPD98402A is compliant with the ATM Forum UNI Recommendations.
FEATURES • Provision of TC sublayer function of ATM protocol physical layer • Support of SONET STS-3c frame/SDH STM-1 frame format • Provision of stop mode for cell scramble/descramble and frame scramble/descramble • Disposal/transitory selection of unassigned cells is possible.
• Compliant with UTOPIA interface • Incorporation of internal loopback function at PMD and ATM layer turns • PMD interface 155.
52 Mbps serial interface 19.
44 MHz parallel interface • Provided with registers for writing/reading overhead information SOH (section overhead): C1 (1st to 3rd) bytes, F1 byte LOH (line overhead): K2 byte POH (pass overhead): F2 byte, C2 byte • CMOS process • +5 V single power supply The information in this document is subject to change without notice.
Document No.
S10835EJ1V0DS00 (1st edition) Date Published December 1995 P Printed in Japan © 1995 µPD98402A • Incorporation of OAM (Operation And Maintenance) function Transmitting side Transmission of various alarms • Transmission by generation of sources Line RDI (FERF), Path RDI (FERF) Line FEBE, Path FEBE • Transmission by command instruction Line AIS, Path AIS Line FEBE, Path FEBE Receiving side • Detection of alarms and error signals LOS (Loss Of Signal) OOF (Out Of Frame) LOF (Loss Of Frame) LOP (Loss Of Pointer) LO...


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