ICS1894-32_1 datasheet(9/53 Pages) IDT

Part #	ICS1894-32

Description	10BASE-T/100BASE-TX INTEGRATED PHYCEIVER WITH RMII INTERFACE

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Manufacturer	IDT [Integrated Device Technology]

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ICS1894-32

10BASE-T/100BASE-TX INTEGRATED PHYCEIVER WITH RMII INTERFACE

PHYCEIVER

IDT® 10BASE-T/100BASE-TX INTEGRATED PHYCEIVER WITH RMII INTERFACE

9

ICS1894-32

REV G 020509

PHY is capable of detecting, and that may otherwise be

undetectable by the MAC sub-layer) was detected

somewhere in the frame presently being transferred from

the PHY. RXER transitions synchronously with respect to

RXC. While RXDV is de-asserted, RXER has no effect on

the MAC.

Reduced MII (RMII) Data Interface

The Reduced Media Independent Interface (RMII) specifies

a low pin count Media Independent Interface (MII). It

provides a common interface between physical layer and

MAC layer devices, and has the following key

characteristics:

• Supports 10Mbps and 100Mbps data rates.

• Uses a single 50MHz reference clock provided by the

MAC or the system board.

• Provides independent 2-bit wide (di-bit) transmit and

receive data paths.

• Contains two distinct groups of signals: one for

transmission and the other for reception.

In RMII mode, a 50 MHz reference clock is connected to

REFIN(pin 30).

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