1 ethernet mac interface, 2 ethernet bridging for 10/100, 3 ethernet traffic classification – Rainbow Electronics DS33M33 User Manual

Page 16: 4 ethernet traffic profiling and policing, 5 ethernet traffic scheduling, 6 ethernet control frame processing, 7 q-in-q, 8 sdram interface, 9 clock rate adapter (clad), Ethernet mac interface

___________________________________________________ DS33M30/M31/M33 ABRIDGED DATA SHEET

Rev: 111908

16 of 20

1.7.1 Ethernet MAC Interface

• One E/FE/GbE port (MII/RMII/GMII)

• 10Mbps/100Mbps/1000Mbps data rates

• Support for DTE or DCE operation

• Half- and full-duplex flow control per IEEE 802.3

• Jumbo frame lengths up to 10KB for GbE

• 64-byte minimum frame size

• Ethernet management interface (MDIO)

• Supports applicable RMON (RFC2819) counters

• Promiscuous and broadcast discard modes

• OAM frames can be intercepted, processed by host software, and responses inserted

1.7.2 Ethernet Bridging for 10/100

• 4K address and VLAN ID lookup table for learning and filtering

• Programmable aging between one to 300 seconds in one-second intervals

1.7.3 Ethernet Traffic Classification

• Ingress classification according to Ethernet COS

• Programmable class map to four queues for each Ethernet port

1.7.4 Ethernet Traffic Profiling and Policing

• Ingress classification by PCP or DSCP

• Programmable class mapping to four queues

• Programmable bandwidth profiling at either the port level or per-class level

• Programmable bandwidth profiling for multicast and broadcast flows

• Policing with programmable CIR/CBS

• Nonconforming Ethernet frames discarded according to the configured BW profile

1.7.5 Ethernet Traffic Scheduling

• Programmable scheduler for Ethernet flows toward PDH port(s):

o Strict priority, or
o Weighted queuing

1.7.6 Ethernet Control Frame Processing

• Control frames, except PAUSE and OAM, are forwarded without processing

• PAUSE and OAM frames can be programmed to be intercepted, discarded or forwarded

1.7.7 Q-in-Q

• Programmable carrier VLAN tag insertion

1.8 SDRAM

Interface

• Interface for up to 256Mb DDR SDRAM (JEDEC JESD79D compliant)

• Compatible with DDR266+

• 16-bit-wide data bus with dual edge transfers and auto refresh timing

• SDRAM interface clock output of 125MHz

• Direct connection to external DDR SDRAM

• Example devices: Micron MT46V16M16, Samsung K4H561638F and Hynix HY5DU561622CF

1.9 Clock Rate Adapter (CLAD)

• Creates DS3, E3, STS-1, and/or telecom bus clocks from single-input reference clock

• Input reference clock to CLAD can be 77.76, 51.84, 44.736, 34.368, or 19.44MHz