SH7672 datasheet(461/1292 Pages) RENESAS

461 / 1292 page

Section 12 Ethernet Controller (EtherC)

Rev. 1.00 Nov. 14, 2007 Page 435 of 1262

REJ09B0437-0100

Manual PAUSE Frame Transmission: PAUSE frames are transmitted by directives from the

software. When writing the Timer value to the manual PAUSE frame set register (MPR), manual

PAUSE frame transmission is started. With this method, PAUSE frame transmission is carried out

only once.

PAUSE Frame Reception: The next frame is not transmitted until the time indicated by the

Timer value elapses after receiving a PAUSE frame. However, the transmission of the current

frame is continued. A received PAUSE frame is valid only when the RXF bit in the EtherC mode

12.5

Connection to PHY-LSI

Figure 12.8 shows the example of connection to a DP83846AVHG by National Semiconductor

Corporation.

TX-ER

MII_TXD3

MII_TXD2

MII_TXD1

MII_TXD0

TX-EN

TX-CLK

MDC

MDIO

MII_RXD3

MII_RXD2

MII_RXD1

MII_RXD0

RX-CLK

CRS

COL

RX-DV

RX-ER

TX_ER

TXD3

TXD2

TXD1

TXD0

TX_EN

TX_CLK

MDC

MDIO

RXD3

RXD2

RXD1

RXD0

RX_CLK

CRS

COL

RX_DV

RX_ER

DP83846AVHG

MII (Media Independent Interface)

This LSI

Figure 12.8 Example of Connection to DP83846AVHG

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