DS33R11+ Maxim Integrated Products, DS33R11+ Datasheet - Page 61

• Manufacturer Part Number: DS33R11+
• Description: IC ETH TXRX T1/E1/J1 256-BGA
• Manufacturer: Maxim Integrated Products
• Type: Transceiverr

Specifications of DS33R11+

• Protocol: T1/E1/J1
• Voltage - Supply: 1.8V, 3.3V
• Mounting Type: Surface Mount
• Package / Case: 256-BGA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Number Of Drivers/receivers: -

9.15.1 MII Mode Options
The Ethernet interface can be configured for MII operation by setting the hardware pin RMIIMIIS low. The MII
interface consists of 17 pins. For instructions on clocking the Ethernet Interface while in MII mode, see Section 9.1.
Diagrams of system connections for MII operation are shown in
9.15.2 RMII Mode
The Ethernet interface can be configured for RMII operation by setting the hardware pin RMIIMIIS high. RMII
interface operates synchronously from the external 50MHz reference (REF_CLK). Only seven signals are required.
The following figure shows the RMII architecture. Note that DCE mode is not supported for RMII mode and RMII is
valid only for full duplex operation.
Figure 9-7. RMII Interface
DS33R11 MAC
TXD[1:0]
TX_EN
REF_CLK
RXD[1:0]
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CRS_DV
Figure 9-5
and
Figure
External PHY
9-6.