Board Description; Block Diagram; Figure 2: Board Block Diagram - Texas Instruments DP83640 Reference Manual

Dual DP83640 Ethernet PHY HSMC Daughter Board

3 Board Description

3.1 Block Diagram

The Board implements the copper line interfaces using a 2x RJ45 array with integrated
magnetics. The MAC interfaces are available at the HSMC connector using 2.5V/3.3V
LVTTL/LVCMOS signaling.
Testsignals
25MHz
Refclk
3.3V
Power
RJ45
(integrated
Transformer)
50MHz
National PHY1
DP83640
RMII
HSMC Connector

Figure 2: Board Block Diagram

RJ45
(integrated
Transformer)
Testsignals
National PHY2
DP83640
General Purpose
Connector 5x2
6
Reference Guide
V1.0 - October 2013
Optional
OTP Device
PLCC-44
Socket
1