Data Sheet
MVTX2802AG
Table of Contents
1.0 Block Functionality............................................................................................................. 5
1.1 Frame Data Buffer (FDB) Interfaces .............................................................................................................5
1.2 Switch Database (SDB) Interface..................................................................................................................5
1.3 GMII/PCS MAC Module (GMAC) .................................................................................................................5
1.4 CPU Interface Module...................................................................................................................................5
1.5 Management Module ....................................................................................................................................5
1.6 Frame Engine ...............................................................................................................................................5
1.7 Search Engine ..............................................................................................................................................5
1.8 LED Interface ................................................................................................................................................5
1.9 Internal Memory ...........................................................................................................................................5
2.0 System Configuration (Stand-alone and Stacking) ......................................................... 6
2.1 Management and Configuration....................................................................................................................6
2.2 Managed Mode ............................................................................................................................................6
2.3 Register Configuration, Frame Transmission, and Frame Reception ...........................................................7
2.3.1 Ethernet Frames..................................................................................................................................7
2.3.2 Control Frames....................................................................................................................................7
2.4 Unmanaged Mode.........................................................................................................................................8
2.5 I2C Interface..................................................................................................................................................8
2.5.1 Start Condition.....................................................................................................................................8
2.5.2 Address................................................................................................................................................8
2.5.3 Data Direction......................................................................................................................................8
2.5.4 Acknowledgment .................................................................................................................................9
2.5.5 Data .....................................................................................................................................................9
2.5.6 Stop Condition .....................................................................................................................................9
2.6 Synchronous Serial Interface ........................................................................................................................9
2.6.1 Write Command.................................................................................................................................10
3.0 Data Forwarding Protocol ................................................................................................ 10
3.1 Unicast Data Frame Forwarding .................................................................................................................10
3.2 Multicast Data Frame Forwarding ..............................................................................................................11
3.3 Frame Forwarding To and From CPU.........................................................................................................11
4.0 Memory Interface .............................................................................................................. 12
4.1 Overview ....................................................................................................................................................12
4.2 Detailed Memory Information ......................................................................................................................12
5.0 Search Engine ................................................................................................................... 12
5.1 Search Engine Overview ............................................................................................................................12
5.2 Basic Flow...................................................................................................................................................13
5.3 Search, Learning, and Aging.......................................................................................................................13
5.3.1 MAC Search ......................................................................................................................................13
5.3.2 Learning.............................................................................................................................................13
5.3.3 Aging..................................................................................................................................................14
5.3.4 Data Structure....................................................................................................................................14
5.3.5 VLAN Port Association Table ............................................................................................................14
6.0 Frame Engine ....................................................................................................................15
6.1 Data Forwarding Summary .........................................................................................................................15
6.2 Frame Engine Details..................................................................................................................................15
6.2.1 FCB Manager ....................................................................................................................................15
6.2.2 Rx Interface .......................................................................................................................................15
6.2.3 RxDMA ..............................................................................................................................................15
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