UPD98401A Description
The µPD98401A (NEASCOT-S15TM) is a high-performance SAR chip that segments and reassembles ATM cells. This chip can interface with an ATM network when it is included in a workstation, puter, front-end processor, network hub, or router. The µPD98401A conforms to the ATM Forum Remendation, and provides the functions of the AAL-5 SAR sublayer and ATM layer.
UPD98401A Key Features
- Conforms to ATM Forum
- AAL-5 SAR sublayer and ATM layer functions
- Hardware support of AAL-5 processing
- Processing of non-AAL-5 traffic (AAL-3/4 cell, OAM cell, RM cell) by software with raw cell processing function
- Hardware support of parison/generation of CRC-10 for non-AAL-5 traffic
- Supports up to 32K virtual channels (VC)
- Provided with 16 traffic shapers that carry out transmission scheduling (control of average rate/peak rate) so as to set
- Interface and mands for controlling PHY device
- Employs “UTOPIA interface” as cell data interface with PHY device
- Octet-level handshake