EVB8187 Standard Microsystems (SMSC), EVB8187 Datasheet - Page 9

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

Specifications of EVB8187

• Lead Free Status / Rohs Status: Supplier Unconfirmed

EVB8187 User Manual
SMSC EVB8187
2.5.3
2.6
2.6.1
2.6.2
PIN
1
2
3
4
5
6
7
8
Table 6 RJ-45 Ethernet Jack Pin-out
Clocking
RJ-45 Ethernet Jack
The pinout for the RJ-45 Jack is described in
Crystal Oscillator
The 25 MHz crystal Y1 is connected to the internal oscillator of the LAN8187. A PLL circuit in the
LAN8187 generates all the timing needed by the PHY.
External Clock
The board can be configured to use an external clock if the crystal Y1 is removed and a 25Mhz +2.0v
signal is injected onto pin Y1.1. Y1.2 is left floating.
TX_CLK
RX_ER
TXP: Transmit Positive
TXN: Transmit Negative
RXP: Receive Positive
RXN: Receive Negative
TX_ER
TX_EN
NAME
CRS
COL
DESCRIPTION
Analog Reference to ground
Analog Reference to ground
Analog Reference to ground
Analog Reference to ground
RELATIVE TO
EVB-LAN8187
DIRECTION
Input/Output
Output
Output
Output
Output
Table 5 MII 40 PIN DESCRIPTION
Input
www.smsc.com
ACTIVE
LEVEL
TBA
TBA
TBA
TBA
TBA
TBA
9
Table 6
DESCRIPTION
Receive Error:
Asserted to indicate that an error was
detected somewhere in the frame
presently being transferred from the PHY.
Transmit Error or Transmit data 4:
This bit is set by the RXD3/nIntsel pin.
Transmit Clock:
25Mhz in 100base-TX mode. 2.5Mhz in
10base-T mode.
Transmit Enable:
Indicates that valid data is present on the
TXD[3:0] signals, for transmission.
MII Collision detection:
Assertion to indicate detection of collision.
Carrier Sense:
Assertion indicates detection of carrier.
below.
Revision 0.7 (12-8-06)