DS33R11 Ethernet Mapper with Integrated T1/E1/J1 Transceiver

9.14.1 DTE and DCE Mode

The Ethernet MII/RMII port can be configured for DCE or DTE Mode. When the port is configured for the DTE Mode it can be connected to an Ethernet PHY. In DCE mode, the port can be connected to MII/RMII MAC devices other than an Ethernet PHY. The DTE/DCE connections for the DS33R11 in MII mode are shown in the following two figures.

In DCE Mode, the DS33R11 transmitter is connected to an external receiver and DS33R11 receiver is connected to an external MAC transmitter. The selection of DTE or DCE mode is done by the hardware pin DCEDTES.

Figure 9-5. Configured as DTE Connected to an Ethernet PHY in MII Mode

DS33R11

 

 

 

Rx

 

Ethernet Phy

 

RXD[3:0]

RXD[3:0]

Rx

DTE

RXDV

RXDV

DCE

 

 

 

RX_CLK

RX_CLK

 

 

RX_ERR

RX_ERR

 

MAC

RX_CRS

RX_CRS

 

COL_DET

COL_DET

 

 

 

 

TXD[3:0]

TXD[3:0]

 

 

 

TX_CLK

Tx

Tx

TX_CLK

 

 

TX_EN

TX_EN

 

 

 

 

 

MDIO

MDIO

 

 

MDC

MDC

 

58 of 344

Page 58
Image 58
Maxim DS33R11 specifications Configured as DTE Connected to an Ethernet PHY in MII Mode, DTE and DCE Mode