Maxim Integrated DS33R11 - Manual (Page 58)

DS33R11 Ethernet Mapper with Integrated T1/E1/J1 Transceiver
58 of 344
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
MAC
RXD[3:0] RXD[3:0]
RX_CLK RX_CLK
RX_ERR RX_ERR
RX_CRS RX_CRS
COL_DET COL_DET
Ethernet Phy
TX_EN
TX_EN
MDC
MDIO
TXD[3:0] TXD[3:0]
TX_CLK
DS33R11
DCE DTE
TX_CLK
MDIO
MDC
RXDV RXDV
Rx
Rx
Tx
Tx