UPD98401A
Overview
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, computer, front-end processor, network hub, or router.
- 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 comparison/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 different transmission rate for each VC
- Interface and commands for controlling PHY device
- Employs “UTOPIA interface” as cell data interface with PHY device - Octet-level handshake - Cell-level handshake
- 32-bit general-purpose bus interface
