TMS570LS3137 datasheet(153/173 Pages) TI1

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MII_RX_CLK

MII_RXD[3:0]

MII_RX_DV

MII_RX_ER

VALID

TMS570LS3137

www.ti.com

SPNS162C – APRIL 2012 – REVISED APRIL 2015

7.11 Ethernet Media Access Controller

The Ethernet Media Access Controller (EMAC) provides an efficient interface between the CPU and the

network. The EMAC supports both 10Base-T and 100Base-TX, or 10 Mbits/second (Mbps) and 100 Mbps

in either half- or full-duplex mode, with hardware flow control and quality of service (QoS) support.

The EMAC controls the flow of packet data from the TMS570 device to the PHY. The MDIO module

controls PHY configuration and status monitoring.

Both the EMAC and the MDIO modules interface to the TMS570 device through a custom interface that

allows efficient data transmission and reception. This custom interface is referred to as the EMAC control

module, and is considered integral to the EMAC/MDIO peripheral. The control module is also used to

multiplex and control interrupts.

7.11.1 Ethernet MII Electrical and Timing Specifications

Figure 7-18. MII Receive Timing

Table 7-28. Timing Requirements for EMAC MII Receive

NO.

MIN

MAX

UNIT

tsu(MIIRXD - MIIRXCLKH)

Setup time, MII_RXD[3:0] before MII_RX_CLK rising edge

tsu(MIIRXDV - MIIRXCLKH)

Setup time, MII_RX_DV before MII_RX_CLK rising edge

tsu(MIIRXER - MIIRXCLKH)

Setup time, MII_RX_ER before MII_RX_CLK rising edge

th(MIIRXCLKH - MIIRXD)

Hold time, MII_RXD[3:0] valid after MII_RX_CLK rising edge

th(MIIRXCLKH - MIIRXDV)

Hold time, MII_RX_DV valid after MII_RX_CLK rising edge

th(MIIRXCLKH - MIIRXER)

Hold time, MII_RX_ER valid after MII_RX_CLK rising edge

Peripheral Information and Electrical Specifications

153

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