Conduction-cooled CompactPCI/PICMG 2.16 Pentium-M Single Board Computer


  • CPCI and PICMG 2.16 compatible
  • Intel® Pentium® M Processor:
  • Single-slot operation with an on-board CompactFlash disk for bootable mass storage
  • 855GME and 6300ESB Chipset
  • Special versions with -40°/+85°C operation with 1.4 GHz Pentium M

The CRM1 is a rugged conduction-cooled 6U single-slot Compact PCI (PCMG 2.16 compatible) platform based on the Intel® low-power Pentium® M processor. The CRM1 takes advantage of the Pentium M's low-power consumption as a rugged Single Board Computer (SBC) with wedge locks and a full-board heat sink for high shock/vibration environments and temperature extremes.

The CRM1 is the same board design as the convection-cooled CPM1 . The CPM1 typically uses front panel I/O routing but can be provided with identical I/O routing as the CRM1 for application development in a standard CompactPCIbus chassis.

The 855GME Graphics Memory Controller Hub (GMCH) and 6300ESB I/O Controller Hub (ICH) chipset supports PCI-X expansion, integrated VGA/DVO interface. I/O interfaces available from rear I/O board include two 1000BaseTX ports are routed to the backplane in compliance with PICMG 2.16. Other rear I/O includes IDE, COM1/2, floppy, dual SATA, four USB 2.0 ports and DVI-I integrated digital/analog graphics.

The CRM1 meets an operating temperature range of -40°/85° C with it's standard 1.4 GHz Pentium M processor.

On-board CompactFlash permits single-slot booting. Two on-board PMC-X sites allow additional I/O capabilities in a single 6U slot.

The CRM1 was design for compliance with MIL-Std-810F. Options include conformal coating.

Additional Photos

CRM1 Block Diagram

Technical Specifications
Processor Intel® Pentium® M Processor:
2 MB of L2 Advanced Transfer Cache
Available in either the Ultra Low Voltage 1.0 GHz Celeron-M 370 version @ 5.5 W, the Low Voltage 1.4 GHz Pentium-M 733 @10 W version, or the
1.8 GHz Pentium-M 745 @ 21 W
Single-slot Operation Single-slot CompactPCI operation with an on-board CompactFlash disk for bootable mass storage
855GME and 6300ESB Chipset

400 MHz 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, four USB 2.0 ports, 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

CompactPCI PICMG 2.0 R3.0 Compliant
PLX non-transparent PCI-PCI bridge provides 64-bit CompactPCI transfer rates at 66 MHz
Universal bridge lets the CRM1 operate as a system
controller or a peripheral slot module
Supports Hot Swapping according to PICMG 2.1 R2.0
Connectors J3 and J5 are used for I/O expansion - J4 is not populated
PMC Expansion Two PMCX sites are available on-board: one with a 32- bit @ 33 MHz and a second with 64-bit @ 66 MHz bandwidth
I/O from the 64-bit PMC site is routed from JN4 to the J3 connector

PICMG 2.16

An Intel 82546 Ethernet controller supports two 10/100/1000BaseTX Ethernet ports routed to the J3 connector in compliance with PICMG 2.16 for back plane fabric switching or for alternate routing to an optional rear I/O card

855GME provides an integrated 32-bit 3D core at 133 MHz
SVGA and 12-bit DVI interfaces are routed through J5

IDE/CompactFlash Primary ATA/100 DMA IDE interface is accessible from the CompactPCI 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, USB, and PXE over Ethernet
Customized versions can be provided
Watchdog Programmable watchdog timer for system recovery
Conduction-cooling Compliant withVITA 30.1-2002
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 CompactPCI chassis for application development, see CPM1
IPMI Pigeon Point’s IPM Sentry offers IPMI system management in compliance with PICMG 2.9
Platform management subsystem monitors, controls and assures proper operation of active components in the chassis
I/O interfaces routed to backplane IDE, COM1/2, Floppy Drive Interface, Dual Serial ATA, and Four USB 2.0 ports (routed through J5)
DVO and VGA ports are routed out through J5
PMC I/O and two Gb Ethernet ports in compliance with PICMG 2.16 (routed through J3)
Conformal coating Conformal coating is an option
Power Consumption 5 VDC @ 2 Amps typical
3.3 VDC @ 2 Amps typical  
Operating Temperature Range 0°/71°C, special versions to -40°/+85°
Net Weight 27 oz with conduction-cooled heatsinks/stiifener installed, with no conformal coating, with 1 GB DRAM, no CompactFlash installed
Environmental Specs Environmental compliance with MIL-STD-810F

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
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 CRM1 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 CRM1 a DVO port (driven via a PanelLink device) and a VGA port out through the J5 connector to the system backplane. The DVO ports:
• Provide high-speed, 12-bit interfaces with 165 MHz dot clocks
• Supports DVO devices (TV-Out Encoders, TMDS & LVDS transmitters, etc.) with pixel resolutions up to 1600 x 1200 @ 85 Hz and up to 1048 x 1536 @ 72 Hz
• Compliant with DVI Specification 1.0
The 6300ESB I/O Controller Hub (ICH) provides most of the CRM1's on-board I/O and it's the CRM1'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 CRM1 for the on-board PMC-X slot, the three Ethernet ports available on the CRM1, and for the Universe IID PCI/CompactPCI bridge
• Four USB 2.0 compliant ports that are routed to the J5 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 J5 to the backplane
• Two Serial ATA ports providing 150 MB/sec data rates are also routed through J5
• 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 CRM1 supports two 10/100/1000BaseTX channels that are routed to the J3 connector in compliance with the PICMG 2.16 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 a 64-bit PCI-X interface 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
Intel 82541 Gigabit Ethernet Controller
The Intel 82541 offers the following features: 10/100/1000BaseTX support with auto-negotiation; Independent 3 KB receive and transmit FIFOs; Powerful on-chip DMA minimizes CPU overhead with zero wait-state burst transfers to system memory; Built-in Phyceiver.
CRM1 I/O Routing
Through J3
Through J5
COM1/2 (RS232/422)   2
DVI-I Graphics   1
USB 2.0   4
Serial ATA   2
Floppy Disk I/F   1
IDE Interface   1
PMC I/O PICMG 2.3 R1.0 Slot B  


Ordering Information
Part# Description
CRM1xQP Rugged conduction-cooled Pentium M single- slot processor with no CompactFlash installed, 1.4 GHz Pentium M, 1 GB DDR-266. CompactPCI, PICMG 2.16, IPMI. With
wedgleocks and stiiffener bar.
xxxxQxx 256 MB Flash for CRM1
xxxxRxx 512 MB Flash for CRM1
xxxxSxx 1 GB Flash for CRM1

2 GB Flash for CRM1

xxxxUxx 4 GB Flash for CRM1
xxxxVxx 8 GB Flash for CRM1
xxxxWxx 16 GB Flash for CRM1
xxxxxQx Upgrade to 1 GB DDR-266 memory
xxxxxx8 1.0 GHz ultra-low-power Celeron M
xxxxxxQ Upgrade to 1.8 GHz Pentium M
XPM1RIO Optional rear I/O interface board with:
small speaker, DVI-I graphics interface, 4 USB connectors, 2 RJ-45 Ethernet connectors, 2 SATA connectors, 1 floppy connector, COM3 &4 (individually selectable for RS-232/422)
CONCOAT-XPM Conformal coating
xxxxxxx-ER Special versions tested to -40°/+85°C


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