TNETV2685FIBZUT7 datasheet(162/191 Pages) TI1

162 / 191 page

TMS320DM647

TMS320DM648

SPRS372H – MAY 2007 – REVISED APRIL 2012

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6.19 3-Port Ethernet Switch Subsystem (3PSW)

The Ethernet module controls the flow of packet data between the device and two external Ethernet PHYs

(DM648 only) or one external Ethernet PHY (DM647 only), with hardware flow control and quality-of-

service (QOS) support. See Figure 6-51 for a block diagram of the Ethernet module. The Ethernet

Subsystem contains a 3-port gigabit switch, where one port is internally connected to the C64x+ DSP (via

the switched central resource) and the other two ports are brought out externally. Each of the external

Ethernet ports support the modes shown in Table 6-77.

The Ethernet module controls the flow of packet data between the device and two external Ethernet

PHYs , with hardware flow control and quality-of-service (QOS) support. See Figure 6-51 for a block

diagram of the Ethernet module. The Ethernet Subsystem contains a 3-port gigabit switch, where one port

is internally connected to the C64x+ DSP (via the switched central resource) and the other two ports are

brought out externally. Each of the external Ethernet ports support the modes shown in Table 6-77.

Table 6-77. Ethernet Operating Modes

DESCRIPTION

DATA RATE

OPERATING MODE

10Base-T

10 Mbits/second (Mbps)

half- or full-duplex

100Base-T

100 Mbits/second (Mbps)

half- or full-duplex

1000Base-T

1000 Mbits/second (Mbps)

full-duplex

The Ethernet Subsystem provides these functions:

•

Ethernet communication/routing by way of two dedicated 10/100/1000 ports with SGMII interfaces

–

Wire-rate switching (802.1d), non-blocking switch fabric

–

Four priority levels of QoS TX support (802.1p) in hardware

–

Programmable interrupt pacing on RX/TX plus interrupt threshold on RX

–

Supports forwarding frame sizes of 64-2020 bytes

•

Address Lookup

–

1024 total address lookup engine (ALE) entries of VLANs and/or MAC addresses

–

L2 address lock and L2 filtering support

–

Multicast/broadcast filtering and forwarding state control

–

Receive-based or destination-based multicast and broadcast rate limits

–

MAC address blocking

–

Source port locking

–

OUI (Vendor ID) host accept/deny feature

–

Host controlled time-based aging

–

MAC authentication (802.1x)

–

Remapping of priority level of VLAN or ports

–

Multiple spanning tree support (spanning tree per VLAN)

162

Peripheral Information and Electrical Specifications

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