RELEASED
DATASHEET
PMC-1991129
ISSUE 7
2.3 Gigabit Ethernet MAC
PM3386
DUAL GIGABIT ETHERNET CONTROLLER
• Verifies frame integrity (i.e. FCS and length checks).
• Erred frames can be filtered or passed to higher layer device.
• Automatic Base page Auto-Negotiation, extended Auto-Negotiation (Next Page)
supported via host.
• Egress Ethernet physical frame encapsulation (pad to min size, add preamble, IFG
and CRC generation).
• Supports Ethernet 2.0, IEEE 802.3 LLC and IEEE 802.3 SNAP/LLC encoding
formats and VLAN tagged frames.
• Provides 8 unicast exact-match address filters to filter frames based on DA or SA
with optional VID.
• Each address filter can be programmed to indicate whether to accept or discard
based on a match.
• Provides a 64 group multicast address filter.
• Supports 64 byte minimum size frames and jumbo frames up to 9.6K bytes.
• Programmable Inter-packet gap (IPG).
• System side loopback through GMAC for diagnostic capability.
2.4 Flow Control
• Supports IEEE 802.3-1998 flow control at each Ethernet port if enabled.
• Programmable watermarks for full/empty FIFO thresholds.
• Automatic generation of PAUSE frames based on FIFO fill levels.
• Upper layer device can flow control Ethernet ports using side-band or host signaling
to cause generation of a PAUSE frame.
• Provides side-band Paused state indication to upstream devices.
• Loss-less flow control on all valid frames up to 9.6k bytes.
2.5 Statistics
• 40 bit counters are used to ensure rollover compliance with IEEE 802.3–1998.
• Minimum 58 minutes before rollover.
• Provides port statistic counters needed to support the standard 802.3-1998, SNMP,
and RMON Management Information Base (MIB) implementations.
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
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