EVB8187 Standard Microsystems (SMSC), EVB8187 Datasheet - Page 6

• Manufacturer Part Number: EVB8187
• Manufacturer: Standard Microsystems (SMSC)

Specifications of EVB8187

• Lead Free Status / Rohs Status: Supplier Unconfirmed

Revision 0.7 (12-8-06)
2.2.5
2.2.6
2.3
2.4
LED2
LED3
Green(link)
Yellow(Act)
led1
D1
D2
test
points
Reference
TP3
Schem
LED indicators.
Test Points
MDIO pullup
Resistor R61 is used to give a pullup to the MDIO pin. Normally the resistor is not needed because
the MAC that the PHY is interfacing to has a pull-up built into its system.
AutoMDIX options
The LAN8187 supports AutoMDIX on the analog output pins.
The EVB8187 supports the option to disable AutoMDIX and to manually select the channel.
Jumper J3 is used to manually disable AutoMDIX funcion. Placing a jumper accross J3 will disable
AutoMDIX functionality and prevent the automatic switching of the TX* with RX*. Please refer to the
LAN8187 datasheet for more information on AutoMDIX function.
Resistor R57 is used to switch the channels. Normally R57 is empty and the chanels are normal (ie
transmit is on TXP and TXN - receive on RXP and RXN). With R57 populated, the channels are
switched (ie. transmit is on RXP and RXN - receive is on TXP and TXN).
The EVB-LAN8187 supports disabling the Automdix through the MDIO interface to the Internal
registers. Setting bit 15 of register 27 to a 1 will disable AutoMDIX switching function. Please refer to
the SMSC LAN8187 datasheet for more information.
There are 7LEDs on the board, 5 placed on the board as discrete components, and 2 on the RJ-45
connector..
Table 2.2,Table 2.3
SPEED100
FDUPLEX
LINK
ACT
GPO1
+5V
+3.3V
Silk screen Name
description
+5v power.
and
Table 2.4
Table 2.2 Test Points
Table 2.1 LED indicators
This LED indicates when the PHY is communicating in
100Base-TX mode. This LED will only come on when the PHY
has a link established.
This LED indicates that the link is communicating in Full Duplex.
This LED indicates that a link to the other host has been made.
This LED indicates that there is communication activity on the
Ethernet Link.
This LED indicates that GPO1 output is low.
This LED indicates that there is +5v power to the board
This LED indicates that there is +3.3v power to the board.
below identify the test points for debug purposes.
www.smsc.com
TP5
points
test
6
+3.3v power supply output.
description
description
EVB8187 User Manual
SMSC EVB8187