VMEbus Conduction-cooled Pentium-M Single Board Computer


  • Intel® Pentium® M Processor:
  • Single-slot VMEbus operation with an on-board compactFlash disk for bootable mass storage
  • 855GME and 6300ESB Chipset
  • -40°/+85°C operation with 1.4 GHz Pentium M

The RPM is a rugged conduction-cooled VMEbus (and VME64) compatible platform based on the Intel® low-power Pentium® M (Dothan) processor. The RPM takes advantage of the Pentium M's low-power consumption as a rugged Single Board Computer (SBC) and it is an IEEE 1101.2-compliant, conduction-cooled VMEbus module with wedge locks and a full-board heat sink for high shock/vibration environments and temperature extremes.

The RPM is the same board design as the convection-cooled DPM . The DPM typically uses front panel I/O routing but can be provided with identical I/O routing as the RPM for application development in a standard VMEbus chassis.

The 855GME Graphics Memory Controller Hub (GMCH) and 6300ESB I/O Controller Hub (ICH) chipset supports
PCI-X expansion, integrated VGA/DVO interface, USB 2.0, ATA/100, and Serial ATA (SATA). Two USB 2.0 ports, a COM port and IDE are all accessible from the rear P2 connector. SVGA and Digital Vido Output (DVO), dual 10/100/1000BaseT (VITA 31.1 compatible), dual SATA, and LPC bus are routed to the optional P0 connector. On-board CompactFlash permits single-slot booting. One PMC-X site is provided for additional I/O expansion.

The RPM meets an operating temperature range of -40°/85° C with it's standard 1.4 GHz Pentium M processor.

The RPM was design for compliance with MIL-Std-810F. Options include conformal coating.

Additional Photos

RPM Block Diagram


Technical Specifications
Processor 2 MB of L2 Advanced Transfer Cache
Available with the Low Voltage at 1.4 GHz @ 10 W
Optional versions available with UltraLowVoltage 1.0 GHz Celeron M or 1.8 GHz Pentium M
Single-slot Operation Single-slot VMEbus operation with an on-board compactFlash disk for bootable mass storage
855GME and 6300ESB Chipset

400 MT/sec System Bus
Ultra ATA 100/66/33 IDE protocol
PCI-X expansion offers 64 bits @ 66 MHz data transfer capability
Integrated Graphics
Chipset includes DRAM controller, USB 2.0 interface, two Serial ATA/150 ports, RTC, NV-RAM, standard PC timers, Ultra DMA, and interrupt logic


DDR-266 support with a memory bandwidth of 2.1 GB/s
Stuffing options for 256MByte, 512MByte or 1GByte
Support ECC

VMEbus Tundra Universe IID PCI-VMEbus interface provides 64- bit VMEbus transfer rates over 30 MB/sec
Full range of software drivers is available for different operating systems
Full Slot 1 (system controller) functions provided
Lower cost versions available without VMEbus
PMC Expansion One conduction-cooled PMC-X site with 64 bit @ 66 MHz bandwidth is available on-board
PMC-P4 is routed in accordance with VITA-35 P4V2- 46dz (PMC-P4 to VME64x-P2-Rows-D,Z)
Ethernet An Intel 82546 Ethernet controller supports two 10/100/1000BaseTX Ethernet ports routed to the P0 connector in compliance with Vita 31.1 for backplane fabric switching or for alternate routing to an optional rear I/O card
Graphics The 855GME offers integrated, high-performance graphics that can support resolutions up to 1600 x 1200 at 85 MHz
DVI-I graphics interface to the P0 backplane connector
PaneLink digital graphic interface combined with a conventional SVGA analog interfac
Supports a 5 meter cable
IDE Primary ATA/100 DMA IDE interface is accessible from the VMEbus P2 connector
PIO and bus master support
Secondary IDE port is routed to a Type II-compatible CompactFlash connector for on-board booting
BIOS General Software's flash-based system BIOS with a variety of boot options, including CD-ROM and PXE over Ethernet
Customized versions available upon request
Watchdog Programmable watchdog timer for system recovery
Conduction-cooling Compliant with IEEE 1101.2
Top and bottom cooling plates that are bonded to the major components through thermal conduction
Wedgelocks secure the RPM in the chassis and bring the module’s heat from the cooling plates and the PCB
Convection-cooled Versions For versions compatible with standard VME chassis for application development, see DPM
I/O interfaces IDE and PMC I/O (routed through P2)
LPC interface runs through P0
COM2 and two distinct USB 2.0 ports are through P2
Two Serial ATA ports, two 10/100/1000BaseTX ports, are routed through P0
DVO/VGA routed to P0
Power Consumption 5 VDC only required
3.5 A @ 5 VDC typical (1.4 GHz Pentium M)
Operating Temperature Range -40°/+85°C with 1.4 GHz Ultra Low Voltage Celeron M)
Environmental Specs Environmental compliance with MIL-STD-810F

Weight 28.2 oz. with no CompactFlash installed, with 1 GB DDR-267, with P0 and conduction-cooling/stiffener bar installed, without conformal coating
Pentium M
The Intel® Pentium® M processor was designed from the ground up with a new microarchitecture that delivers high performance with low power consumption. With its 90 nm processing technology and 2 MB of L2 advanced transfer cache, the Pentium M offers more performance per Watt. Second-generation Streaming SIMD Extensions (Streaming SIMD Extensions 2) capability adds 144 new instructions, including 128-bit SIMD integer arithmetic and 128-bit SIMD double-precision floating-point operation. The Pentium. The Pentium M also offers a dedicated hardware stack manager that employs sophisticated hardware control for improved stack management, advanced branch prediction capability, and a 400 MHz front side bus to the memory controller hub.
Chipset and 6300ESB ICH C
The Intel® 855GME Graphics Memory Controller Hub (GMCH) and Intel® 6300ESB I/O Controller Hub (ICH) chipset create an optimized integrated graphics solution with a 400 MHz system bus and integrated 32-bit 3D core at 133 MHz.
DRAM Controller
The 855GME (GMCH) provides a 266 MHz interface to DDR RAM (72 bits wide with ECC). The RPM can be populated with one or two banks of DRAM for 512 MB or 1 GB of total memory respectively. The GMCH system memory architecture is optimized to maintain open pages (up to 16-kB page size) across multiple rows. As a result, up to 16 pages across four rows is supported. To complement this, the GMCH will tend to keep pages open within rows, or will only close a single bank on a page miss.
Graphics Processor
The 855GME also has an advanced integrated graphical display controller. The RPM routes the DVO and analog graphics to P2
The 6300ESB I/O Controller Hub (ICH) provides most of the RPM's on-board I/O and it's the RPM's PCI-X expansion bridge. The ICH is designed as a low-power, high-performance I/O hub that features:
· 64-bit @ 66 MHz PCI-X expansion that is used on the RPM for the on-board PMC-X slot, the three Ethernet ports available on the RPM, and for the Universe IID PCI/VMEbus bridge
· Two USB 2.0 compliant ports routed to the P2 connector to the backplane
· Integrated IDE controller supports Ultra 100 DMA Mode Transfers up to 100 MB/sec read cycles and 88.88 MB/sec write cycles for a CompactFlash drive on-board and a primary IDE port that is routed through P2 to the RPMPTB
· Two Serial ATA ports providing 150 MB/sec data rates are routed through P0
· Standard PC functionality like a battery-backed RTC and 256-bytes of CMOS RAM, Power Management Logic, Interrupt Controller, Watchdog Timer, AC'97 CODEC, Integrated 16550 compatible UART's, and multimedia timers based on the 82C54
Intel 82546EB Dual Gigabit Ethernet Controller
The DHC supports two 10/100/1000BaseTX channels that are routed to the P0 connector in compliance with the Vita 31.1 Specification for backplane fabric switching. The Intel 82546EB Dual Port Gigabit Ethernet Controller incorporates two full Gigabit Ethernet MAC and PHY layer functions on a single, compact component. Routed from the ICH, the front side data path to the dual Ethernet port controller is 64 bits at 66 MHz. The Intel 82546EB offers the following features: 10, 100, and 1000BaseTX support with auto-negotiation; Dual 64KB configurable RX and TX packet FIFOs; 128-bit internal data path architecture for low latency data handling and superior DMA transfer rate performance; Built-in Phyceiver.
Tundra Universe IID CA91C142D PCI-VMEbus Interface
The PCI-VMEbus interface, based on the Tundra Universe IID CA91C142D, offers the following features:
· High-performance 64-bit VMEbus interface
· Integral FIFOs for write-posting allow the Universe IID to quickly relinquish the bus
· Programmable DMA controller with linked list support
· Full VMEbus system controller functionality
· Complete VMEbus address and data transfer modes: A32/A24/A16 master and slave; D64 (MBLT)/D32/D16/D08 master and slave
RPM I/O Routing
I/O Through P0 P2
DVI-I Graphics 1+  
Serial ATA 2  
AC'97 CODEC 1  
Gb Ethernet 2 (VITA 31.1)  
RS-232 COM 2 Port   1
USB 2.0   2
IDE Interface   1


Ordering Information
Part# Description
RPMxQPGx Conduction-cooled VME64 Single-slot CPU board with 1.4 GHz Pentium-M. 1 GB DDR-267 DRAM. COM2, 2x USB 2.0 and IDE routed to P2. PCI-X compatible PMC site with front and rear access. Support for up to 4 GB bootable CompactFlash. Dual 10/100/1000BaseT, dual SATA, and DVI-I/VGA routed to P0. VITA 31.1 compliant. LPC routed to P0 . -40°/+85°C operation.
xPMQxxxx 256 MB Flash for RPM
xPMRxxxx 512 MB Flash for RPM
xPMSxxxx 1 GB Flash for RPM

2 GB Flash for RPM

xPMUxxxx 4 GB Flash for RPM
xPMVxxxx 8 GB Flash for RPM
XPMxxxxx-ER Chamber testing to customer thermal profile
CONCOAT-XPM Conformal coating
DSW-500- RPM VxWorks BSP (one time charge)
DSW-700-RPM DriveVME, a high-performance VME-to-Windows/NT Systems Software Link (Development version)
DSW-700-RPM DriveVME, a high-performance VME-to-Windows/NT Systems Software Link (Development version)
DSW-700XP-RPM DriveVME for Windows XP
DSW-7002K-RPM DriveVME for Windows 2000
DSW-B00-RPM BSP for Linux (Redhat Linux or other distributions upon request)
DSW-RTX-RPM RTX driver for VMEbus (Tundra Universe 2)


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