User`s guide

8 • Introduction
1.3.10 PCI Mezzanine Card (PMC) Interface
The cPCI-6765(A) provides a location for one on-board PMC device with front
panel access. The PMC interface is on the PCI Bus with PMC VIO default
factory setting tied to 5.0V by 0-ohm resistors R33 and R34. If R33 and R34
are removed, and R38 and R49 are installed with 0-ohm resistors, the PMC
VIO is 3.3V.
1.3.11 Watchdog Timer
The watchdog timer optionally monitors system operation and can be
programmed for different timeout periods (from 1 seconds to 255 seconds
or 1 minute to 255 minutes). A register bit can be enabled to indicate if the
watchdog timer caused the reset event. The watchdog timer register is
cleared on power-up, enabling system software to take appropriate action if
the watchdog generated the reboot.
1.3.12 Ethernet Interfaces
The cPCI-6765(A) provides two 10/100Mbps Ethernet interfaces and is
controlled via the Intel 82559 chipset. Both Ethernet ports are assigned a
unique static MAC Address. The board’s Ethernet Address is displayed on a
label attached to the board. LED drive signals for Ethernet link status and
activity are routed to the same connector. The onboard Ethernet is wired for
Management 2.0 compliance, the rear Ethernet complies with PICMG 2.16.
Switching from front to PICMG 2.16 backplane/rear is done through
dipswitches.
1.3.13 Graphic Interfaces
The CPCI-6765(A) provides standard analog SVGA output on front and rear
IO. The video function is provided via the M69000 chip. The BIOS has a
selection in the CMOS setup to disable the onboard video allowing users to
use a PMC video as the primary video controller. The BIOS also has a
selection in the CMOS setup to disable the onboard video to allow the user to
reclaim the video memory for other applications without having to add
another video card.
1.3.14 IDE Hard Drive
The cPCI-6765(A) Bus Master IDE controller supports 2 EIDE interfaces.
Two 40-pin EIDE connectors available to the rear transition module supports
PIO Mode 3/4 and Ultra DMA/33 IDE devices and a 44-pin secondary EIDE
connector on-board allows support for a 2.5” notebook size HDD or a
Flash2000
TM
flash disk. The cPCI-6765(A) IDE controller resides in the Intel
82374 chipset.