User Manual

___________________________________________________ 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