MPC8280 datasheet(791/1386 Pages) FREESCALE

791 / 1386 page

SCC Ethernet Mode

MPC8280 PowerQUICC II Family Reference Manual, Rev. 1

Freescale Semiconductor

25-3

— Two nonaggressive backoff modes

— Automatic frame retransmission (until the attempt limit is reached)

— Automatic discard of incoming collided frames

— Delay transmission of new frames for specified interframe gap

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Maximum 10 Mbps bit rate

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Optional full-duplex support

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Back-to-back frame reception

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Detection of receive frames that are too long

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Multibuffer data structure

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Supports 48-bit addresses in three modes

— Physical: One 48-bit address recognized or 64-bin hash table for physical addresses

— Logical: 64-bin group address hash table plus broadcast address checking

— Promiscuous: Receives all addresses, but discards frame if REJECT is asserted

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External content-addressable memory (CAM) support on serial bus interfaces

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Up to eight parallel I/O pins can be sampled and appended to any frame

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Optional heartbeat indication

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Transmitter network management and diagnostics

— Lost carrier sense

— Underrun

— Number of collisions exceeded the maximum allowed

— Number of retries per frame

— Deferred frame indication

— Late collision

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Receiver network management and diagnostics

— CRC error indication

— Nonoctet alignment error

— Frame too short

— Frame too long

— Overrun

— Busy (out of buffers)

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Error counters

— Discarded frames (out of buffers or overrun occurred)

— CRC errors

— Alignment errors

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Internal and external loopback mode

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