DS33X11+ Maxim Integrated Products, DS33X11+ Datasheet - Page 66

• Manufacturer Part Number: DS33X11+
• Description: IC MAPPING ETHERNET 144CSBGA
• Manufacturer: Maxim Integrated Products

Specifications of DS33X11+

• Applications: Data Transport
• Interface: SPI
• Voltage - Supply: 1.8V, 2.5V, 3.3V
• Package / Case: 144-CSBGA
• Mounting Type: Surface Mount
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

8.15.4 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 7 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 8-12. RMII Interface (DTE Mode Only)
Rev: 063008
________________________________________________ DS33X162/X161/X82/X81/X42/X41/X11/W41/W11
DS33X MAC - RMII
Transmit
Receive
MAC
MAC
TXD[1:0]
TX_EN
REF_CLK
RXD[1:0]
CRS_DV
PHY RMII to MII
RXD[3:0]
TXD[3:0]
TX_ERR
TX_CLK
RX_DV
RX_ER
RX_CLK
CRS
TX_EN
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