D602 - PowerPC Safe Computer

6U CompactPCI The D602 is a 6U CompactPCI COTS computer with onboard functional safety that realizes triple redundancy on a single board to achieve fail-operational, fault-tolerant behavior.

Petr Chalupa

Petr Chalupa

Odolné PC, Military, TEMPEST, Doprava +420 251 614 073

Základní informace

Main Features

  • 3x PowerPC 750 (lockstep mode), 3x 512 MB DDR RAM
  • Fail-operational, fault-tolerant behavior
  • Fail-safe and fail-silent board architecture
  • Clustering of two D602 to raise availability
  • Board management, BITE
  • SEU (radiation) tolerant
  • Certifiable up to SIL 4 (with report from T? Sd) and DAL-A
  • Developed according to RTCA DO-254, EN 50129 and IEC 61508
  • EN 50155 compliance
  • Up to -40 to +70C with qualified components
  • Convection or conduction cooling


Technical Data
  • 3x PowerPC 750 CL
    • Scalable performance
    • 1 GHz processor core frequency
    • Superscalar
    • Classic PowerPC FPU, MMU
    • CPU bus to FPGA: 100-MHz/64-bit
  • Lock-step operation
    • All CPUs do the same thing at the same time
    • 2-out-of-3 voting in FPGA with CPU bus clock speed (100MHz)
    • Software-assisted resynchronization
    • No functional interruption in case of an SEU inside the CPU
  • Chipset
    • North- and Southbridge realized in FPGA
  • 2x 32 kB L1 cache, 1MB L2 cache integrated in each CPU
  • 3 independent ranks of 512MB DDR SDRAM system memory, FPGA-controlled
    • 100MHz memory bus frequency (32 bit)
    • Up to 800 MB/s
    • 2-out-of-3 voting in FPGA
    • Scrubbing to prevent accumulation of SEU
    • No functional interruption in case of an SEU inside the memory
  • 2 independent ranks of 256MB Flash, FPGA-controlled
    • Primary and backup Flash ranks contain the same data, auto-selection by boot loader
    • ECC protection
  • 1MB FRAM
    • ECC protection
  • 4KB serial EEPROM for production data (serial number etc.)
  • All I/O realized in FPGA and available at rear I/O
  • Sextuple UART
    • E.g., for communication with other D602
    • Data rates up to 460,800 Baud for each channel
    • Handshake lines: none
  • RS232 UART
    • Data rates up to 460,800 Baud
    • 2x 256 Byte transmit/receive buffer
    • Handshake lines: none
  • PCI bus
  • I²C bus
Mezzanine Slots
Two PMC slots
  • 32 bit/33 MHz, 3.3V V(I/O)
  • PMC slot 1 with rear I/O (revisions -02 and later)
  • Voltage monitoring
  • Temperature monitoring
  • Watchdog
  • Reset signal control
  • Control of redundant power supplies
  • Sleep mode
    • Lowers power consumption in case of primary power supply interruption
    • Power failure indicated through signals from backplane
    • Supports power interruptions specified in Airbus directive ABD0100.1.9
    • CPUs and memory can be put into sleep mode
  • Redundant clock generation
  • Connection with second D602 possible (with special backplane)
    • Control of shared outputs
    • Exchange of state information
    • BMC and 6x UART link
CompactPCI Bus
  • Compliance with CompactPCI Core Specification PICMG 2.0 R3.0
  • System slot
  • 32-bit/33-MHz PCI-to-PCI bridge
  • V(I/O): +3.3V
Electrical Specifications
  • Dual power input from CompactPCI bus, uninterrupted (EN50155, Class S1)
    • 3.3V (-5%/+5%)
    • 5V (-3%/+5%)
    • Standard backplane supplies both input rails with power
    • Continued operation if one power input fails (or is not present)
    • Separate power supplies for the three CPUs and the three main memory ranks
  • Supply voltage/power consumption:
    • 30W
    • 15W in sleep mode
Mechanical Specifications
  • Dimensions: conforming to CompactPCI specification for 6U boards
  • Front panel: 4HP with ejector
  • Weight: 640g (with heat sink)
Environmental Specifications
  • Temperature range (operation):
    • 1-slot models: -40..+55°C (qualified components), temperature classes T1, T2, and TX inside buildings, or in containers with temperature control for signalling equipment, according to EN 50125-3, table 2
    • 2-slot models: -40..+70°C (qualified components), temperature classes T1, T2, and T3 for equipment onboard rolling stock, according to EN 50125-1, table 2
    • Airflow: min. 2 m/s
  • Temperature range (storage): -40..+85°C
  • Relative humidity (operation): max. 95% non-condensing
  • Relative humidity (storage): max. 95% non-condensing
  • Altitude: -300m to +2,000m (EN50124, Class AX)
  • Compliant to EN50125-1, meeting requirements of EN61373, Cat. 1, Class B and Classes GTX, GL3 for rolling stock
    • Shock: 50 m/s², 30 ms (EN 61373)
    • Vibration (function): 1 m/s², 5 Hz - 150 Hz (EN 61373)
    • Vibration (lifetime): 7.9 m/s², 5 Hz - 150 Hz (EN 61373)
  • For signalling equipment, a distance of 3m from the track bed is required
  • Protection class IP00 (EN50124, Category PD1)
  • Conformal coating on request
  • All components soldered
  • 46 000 h @ 40°C according to MIL.HDBK-217FN2 with modifications.
    • Weighted mean figure for 65% operation in AIC (air inhabited cargo) and 35% operation in GF (ground fixed) conditions
  • 312 437 h @ 40°C according to IEC/TR 62380 (RDF 2000)
  • 430 705 h for continuous operation @ 25°C according to IEC/TR 62380 (RDF 2000)
  • Erroneous behavior of CPU/memory subsystem < 1E-8/h
    • Considering hardware failures and worst-case SEU environment
  • PCB manufactured with a flammability rating of 94V-0 by UL recognized manufacturers
EMC Conformity
  • EN55011 (radiated emission disturbances - rolling stock)
  • EN 61000-6-4 (radiated emission disturbances - signalling equipment)
  • EN 61000-4-3 (electromagnetic field immunity)
  • EN61000-4-2 (electrostatic discharge immunity)
  • EN61000-4-8 (power - frequency magnetic field)
  • EN61000-4-9 (pulsed magnetic field)
Software Support
  • VxWorks, VxWorks/Cert
  • PikeOS

Blokové schéma

MEN D602 - PowerPC Safe Computer


Mezzanine Slots
PMC slot 2 customized for AFDX PMC (rear I/O only)
Real-time Clock
Buffered by GoldCap
Environmental Specifications
Temperature range (operation):
  • -40..+70°C (8HP front panel with convection cooling or 4HP front panel with conduction cooling)
Cooling Concept
Also available with conduction cooling in MEN CCA frame
Some of these options may only be available for large volumes.


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