Specifications

24 Altera Corporation
EPXA10 Development Board Hardware Reference Manual
10/100 Ethernet Parallel Interface
The Ethernet interface consists of a transceiver, or PHY layer, and
associated discrete components. You can use the interface to implement
an Ethernet media access controller (MAC) in the EPXA10 device. As
shown in Table 34 on page 46, the connections consist of the standard
media-independent interface (MII) and additional signals. Table 16
provides information on the devices used to implement the Ethernet
interface.
Table 17 lists the LEDs used for the Ethernet on the EPXA10 development
board.
RX_UART2 This is set on to indicate activity on the line
CONF_DONE This is set on to indicate that PLD configuration is complete
Table 15. UART LEDs (Part 2 of 2)
LED Reference Description
Table 16. Ethernet Interface Device Reference
Reference Part Number Manufacturer Website Address Description
U176 78Q2120-64CGT (TQFP64) TDK www.tdk.com Fast Ethernet MII transceiver
U177 PE-68515L Pulse www.pulseeng.com 10/100-BASE T single-port
transformer module
U178 AMP 555078-1 AMP www.amp.com 8-pin PCB RJ45 data socket
Table 17. Ethernet LEDs
LED Reference Description
LEDL Link LED. This is set on during linkup
LEDTX Transmit LED. This is set on during transmission
LEDRX Receive LED. This is set on during receipt
LEDFDX Full-duplex LED. This set on for full-duplex mode and off for half-duplex
LEDCOL Collision LED. This is set on in half-duplex mode when a collision occurs, and is held off in full-
duplex mode
LEDBTX 100-BASE TX LED. This is set on for 100-BASE T connection, but off otherwise
LEDBT 10-BASE T LED. This is set on for 10-BASE T connection, but is off otherwise