Texas Instruments DP83826EVM, Руководство пользователя, Страница: 10 / 28

Board Setup Details
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10 SNLU262 – December 2019
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DP83826EVM User’s Guide
3.2 EVM High Level Summary
Table 2. DP83826EVM Applications
N0. TEST CASES APPLICATIONS HOW TO USE
1 MII/RMII to Copper
Run traffic between MII/RMII and Copper.
Connect to DP83826 EVM or MAC System
using Header pins.
Perform IEEE and UNH compliance testing Using onboard MSP430 and software.
Run EMI/EMC Test on EVM
Use internal PRBS and loopback. Onboard
MSP430 can be used for register access.
Measure Power Dissipation Connect external power supplies.
External MAC loopback
Connect external MAC to headers and use
MAC loopback register settings
50MHz output clock Optional Clock out SMA
2 Loopback
Data received by the PHY can be looped back
through the interface without needing a MAC.
Use onboard MSP430 to enable loopback.
3 Repeater Mode RMII back to back as range extender.
Two EVMs can be connected back to back
using custom header cable.
4 Low Power modes
Demonstrate EEE Use onboard MSP430 to enable EEE.
Demonstrate Sleep and Power down mode
Use onboard MSP430 to activate low
power mode
4 Configurations Options
4.1 MDIO Register Access
To update or read the registers of the device, the user can simply connect the DP83826EVM to a
computer and use the USB-2-MDIO software. The EVM is designed to easily enable and test strap
functionality through software instead without the need to modify the board and hardware. This allows for
simple hardware and software support for those that do not have MDIO communication capability. The
register map used for the DP83826EVM can be found in section 8.7 of the DP83826E Datasheet.
More information on how to access the DP83826 MDIO status and control registers can be found in the
USB-2-MDIO Software User's Guide .
5 EMI Results
This section provides details of the EMI tests performed and its results.
Table 3. DP83826EVM EMI Tests Performed
TEST STANDARD TEST LEVEL RESULT
Radiated Emissions
100M MII
CISPR 22 Class B Below Limit Levels
Radiated Emissions
100M RMII Master
Conducted Emissions
100M MII
Conducted Emissions
100M RMII Master