User`s manual

40 Functional Description

remains off, a valid link has not been established due to a miss-

ing or a fault connection.

Table 3-8: Ethernet LED Status Definitions

Board-to-Board Connector

The 60-pin female Board-to-Board Connector (CN4) connects the

main board to the DB-3920L2 daughter board, allowing I/O expan-

sion and HDD connectivity for the cPCI-3920B 8HP version. The

DB-3920L2 provides the following interfaces:

X Two USB2.0 ports

X Low pin count bus

X PS/2 Keyboard Mouse port

X SATA port with power

X XDP debug port

Legend for CN4 Pin Assignment

Status Speed LED Act LED

Network link is not established OFF OFF

10/100 Mbps

Link OFF ON

Active OFF Blink

1000 Mbps

Link ON ON

Active ON Blink

USB Interface and power

Serial ATA port

Low pin count interface

DP related signals

USBx

SATAx

LPCx

XDPx

BPMx

KB/MS port

Kx, Mx