User guide

User Guide CC3-CAJUN • Low Power CompactPCI CPU
- 28 -
EKF Elektronik GmbH • Philipp-Reis-Str. 4 • 59065 Hamm • Germany
Tel. [phone] • Fax. [phone] • [e-mail] • www.ekf.com
ATA (Hard Disk Activity) LED
The CC3-CAJUN is provided with a software programmable LED in the front panel, labeled as
ATA. After system reset, this LED defaults to signal the ATA/IDE activity. By the first setting of the
GPO22 of the ICH2 82801 this LED changes its function and is then controlled only by the level
of the GPO22 pin. Setting this output to 1 will switch on the LED.
The LED IDE remains in the programmable state until the next system reset.
GP (General Purpose) LED
A second programmable LED can be also observed from the front panel. The status of the GP
LED is controlled by the GPO23 output of the ICH2. As of current, the GP LED is not dedicated
to any particular hardware or firmware function (this may change in the future). It is therefore
user programmable.
Hot Swap Detection
The CompactPCI specification added the signal ENUM# to the PCI bus to allow the system hot
swapping. This signal is routed to the GPI6 of the ICH2 82801 on the CC3-CAJUN. A System
Management Interrupt (SMI) can be requested if ENUM# changes by insertion or removal of a
board.
Note that the CC3-CAJUN itself isn’t a hot swap device, because it makes no sense to remove
the system controller from a CompactPCI system. However, it is capable to recognize the hot
swap of peripheral boards and to start software that is doing any necessary system
reconfiguration.
Power Supply Status (DEG#, FAL#)
Power supply failures may be detected before the system crashes down by monitoring the
signals DEG# or FAL#. These active low lines are additions of the CompactPCI specification and
may be driven by the power supply.
DEG# signals the degrading of the supply voltages, FAL# there possible failure.
On the CC3-CAJUN FAL# is routed to the GPI0 and DEG# to the GPI1 of the ICH2 82801.
PXI Trigger Signals
As an option, the CC3-CAJUN supports four of the eight trigger signals of the PXI standard, as
defined by National Instruments. The trigger signals are provided by the local SIO (Super-I/O)
chip. GPIO20/21 are routed to TRIG0/1, and GPIO26/27 are used to control TRIG6/7. These
signals can also be used as GPIO lines in a non-PXI environment.