Specifications

MII/RMII INTERFACE
10BASE -T
&
100BASE-TX
TRANSMIT BLOCK
10BASE -T
&
100BASE-TX
RECEIVE BLOCK
MANAGEMENT
REGISTERS
AUTO-NEGOTIATION
REGISTERS
CLOCK
GENERATION
AUTO-MDIX
LED
DRIVER
DAC
ADC
TD+/- RD+/- LED
SYSTEM CLOCK
REFERENCE
RX_CLK RX_DATATX_CLKTX_DATA
RX_CLK
TX_CLK
TXD[3:0]
TX_EN
MDIO
MDC
COL
CRS/CRS_DV
RX_ER RX_DV
RXD[3:0]
SERIAL
MANAGEMENT
MII/RMII
DP83848Q-Q1
www.ti.com SNLS341C –MARCH 2011–REVISED MARCH 2015
5 Detailed Description
5.1 Overview
The device is 10/100 Mbps Ethernet transceiver with an extended temperature range of –40°C to 105°C.
The ability to perform over extreme temperatures makes this device ideal for demanding environments like
Automotive, Transportation and Industrial Applications.
The device is AEC-Q100 Grade 2 certified. Its 3.3-V operating voltage and less than 270-mW typical
power consumption makes this device suitable for low power applications.
The device has Auto MDIX capability to select MDI or MDIX automatically. The device supports Auto-
Negotiation for selecting the highest performance mode of operation. This functionality can be turned off if
a particular mode is to be forced.
The device supports both MII and RMII interface thus being more flexible and increasing the number of
compatible MPU. MII and RMII options can be selected using strap options or register control. The device
operates with 25-MHz clock when in MII mode and requires a 50-MHz clock when in RMII mode.
5.2 Functional Block Diagram
Copyright © 2011–2015, Texas Instruments Incorporated Detailed Description 25
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