•
System interface will be via the MII connector, and MII
header
•
RJ-45 for network connection
•
JTAG access via 2x5 header
Usage setup and Configuration
This section contains information about the setup and con-
figuration of the POEPHYTEREV-I/-E evaluation board, in-
cluding descriptions of the card's interfaces, connectors,
jumpers and LEDs.
Power for the POEPHYTEREV board can be supplied by a
number of means:
•
MII connector J1
•
PoE over unused pairs
•
PoE over data pairs
•
External supply to P1
•
If 5V is supplied from the MII connector, the on-board
voltage regulator, U2, will convert 5V to 3.3V for the
PHYTER®. J7 should be removed.
•
If 3.3V is supplied from the MII connector, J7 needs to be
ON (See schematics for details).
•
Only applies to the circuit board version with PCB serial
number 551013040-001 Rev A: J7 should be shorted if the
PoE main output is set at 3.3V, which is the default factory
setting. To modify the output to other higher voltages, a
3.3V LDO should be installed onto U2 and J7 must be
open.
Address Settings:
The PMD address for the DP83848 Physical Layer device is
set by jumper J3.
•
Default board setting for the PHY Address is 01h
•
The board may be set to PHY Address 03h by adding
jumper J3
Table of Jumpers
Jumper
Name
Function
J1
MII Male Connector
MII interface
J2
MII Header
Alternative connection for MII signals
J3
PHYAD1
PHY Address strap pin
J4
MDIX_EN
Enable/Disable MDIX mode. (Default is Auto-MDIX Enable)
J5
LED_CFG
Set LED configuration. See datasheet
J6(Not populated)
J7
MII 3V3 option
Use 3V3 MII supply
J8
PWR_DWN/INT
Set Power Down and Interrupt Mode. See datasheet
J9
RESET_N
Reset the device
J10 (Not populated)
J11 (Not populated)
J12
Pulse Jack
Integrated Magnetic RJ-45 connector
Additional information for all options above may be found in the DP83848 datasheet.
Status indicators: LEDs
The POEPHYTEREV board supplies numerous status indi-
cators via LEDs.
Status provided include:
Link - DS3*
Media Speed - DS2
Activity/Collision - DS4*
Ethernet Device Power - DS1
PoE Power - LED1
*Other status can be indicated by these LEDs. The alternate
status is set by adding jumper J5. Refer the DP83848
datasheet for additional information.
Ethernet Performance
The DP83848 PHYTER® supports line speed Ethernet net-
work communications. Signal quality, which affects IEEE
compliance, can vary depending on board layout, power sup-
plies, and components used, esp. isolation magnetics.
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