SPEAR320S datasheet(17/113 Pages) STMICROELECTRONICS

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SPEAr320S

Device functions

Doc ID 022508 Rev 2

17/113

2.9.2

RMII0 and MII1/RMII1 Ethernet controllers

These functional blocks extend Ethernet capability by covering the Media independent

interface (MII) and Reduced media independent interface (RMII) standards.

They can be used in two ways:

●

as a single additional MAC controller with Media independent interface (MII1)

●

as two MAC controllers with Reduced media independent interface (RMII0, RMII1)

In RMII configuration, each controller has an independent set of data and control lines. The

reference clock (50 MHz) is shared by the controllers.

Main features:

●

Compatible with IEEE Standard 802.3

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UNH tested

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10 and 100 Mbit/s operation

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Full and half duplex operation

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Statistics counter registers for RMON/MIB

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Automatic pad and CRC generation on transmitted frames

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Automatic discard of frames received with errors

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Address checking logic supports up to four specific 48-bit addresses

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Supports promiscuous mode where all valid received frames are copied to memory

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Hash matching of unicast and multicast destination addresses

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External address matching of received frames

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Supports serial network interface operation

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Half-duplex flow control by forcing collisions on incoming frames

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Full-duplex flow control with recognition of incoming pause frames and hardware

generation of transmitted pause frames

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Support for 802.1Q VLAN tagging with recognition of incoming VLAN and priority

tagged frames

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Multiple buffers per receive and transmit frame

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Jumbo frames of up to 10240 bytes supported

2.10

MMC-SD card/SDIO controller

The MMC-SD card /SDIO controller conforms to the SD Host Controller Standard

Specification, version 2.0. It handles SD/SDIO protocol at transmission level by packing

data, adding cyclic redundancy check (CRC) and start/end bit as well as checking for

transaction format correctness.

The controller is designed to work with I/O cards, read-only cards and read/write cards, and

can operate either in SD mode (1-bit, 4-bit, 8-bit) or in SPI mode.

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