Specifications

Intel® Server Board S3420GPRX TPS Functional Architecture
Revision 1.1
Intel order number E92065-001
25
 USB Specification-compliant keyboards
 USB Specification-compliant mouse
 USB Specification-compliant storage devices that utilize bulk-only transport mechanism
USB devices are scanned to determine if they are required for booting.
The BIOS supports USB 2.0 mode of operation, and as such supports USB 1.1 and USB 2.0
compliant devices and host controllers.
During the pre-boot phase, the BIOS automatically supports the hot addition and hot removal of
USB devices and a short beep is emitted to indicate such an action. For example, if a USB
device is hot plugged, the BIOS detects the device insertion, initializes the device, and makes it
available to the user. During POST, when the USB controller is initialized, it emits a short beep
for each USB device plugged into the system as they were all just “hot added”.
Only on-board USB controllers are initialized by BIOS. This does not prevent the operating
system from supporting any available USB controllers including add-in cards.
3.3.7.2 Legacy USB Support
The BIOS s
upports PS/2 emulation of USB keyboards and mouse. During POST, the BIOS
initializes and configures the root hub ports and searches for a keyboard and/or a mouse on the
USB hub and then enables the devices that are recognized.
3.4 Optional Intel
®
SAS Entry RAID Module AXX4SASMOD
The Intel
®
Server Board S3420GPRX provides a SAS Mezzanine slot (J2H1) for the installation
of an optional Intel
®
SAS Entry RAID Module AXX4SASMOD. Once the optional Intel
®
SAS
Entry RAID Module AXX4SASMOD is detected, the x4 PCI Express* links from the PCI
switches to the SAS Mezzanine slot. The optional Intel
®
SAS Entry RAID Module
AXX4SASMOD includes a SAS1064e controller that supports x4 PCI Express* link widths and
is a single-function PCI Express* end-point device.
The SAS controller supports the SAS protocol as described in the Serial Attached SCSI
Standard, version 1.0, and also supports SAS 1.1 features. A 32-bit external memory bus off the
SAS1064e controller provides an interface for Flash ROM and NVSRAM (Non-volatile Static
Random Access Memory) devices.
The optional Intel
®
SAS Entry RAID Module AXX4SASMOD provides four SAS connectors that
support up to four hard drives with a non-expander backplane or up to eight hard drives with an
expander backplane.
4 ports full featured SAS/SATA hardware RAID through optional Intel
®
Integrated RAID Module
SROMBSASMR (AXXROMBSASMR) provides RAID 0, 1, 5, 6 and striping capability for spans
10, 50, 60.
3.5 Intel® I/O Expansion Modules
The Intel
®
Server Board S3420GPRX supports a variety of I/O Module options using 2x4 PCI
Express* Gen2 Intel
®
I/O Expansion Module connectors on the rear of the server board. Each
Intel
®
I/O Expansion Module connector is a 50-pin, surface mount, 0.8mm pitch, header. The