Control Communication & Storage Module

CCSM Motherboard
Techno System developments (TSD) has recently completed the development of an electronic module devoted to the Payload Data Handling and Storage for low cost missions, like LEO Small Satellite and in general for Missions with low radiation tolerance requirements.
 
The realization of the module has been carried out in the frame of an ESA funded program for technological developments.
 
Purpose of the program was the realization of a LEON-based CPU module with reduced SWaP (Size, Weight and Power) but with advanced data handling and storage capabilities.


  Justification of the Development

  • The SATA SSD storage technology has gained a good penetration also in the military and defense segments thanks to its relevant benefits over competitive solutions and to the technological trend in the industry and consumer markets

  • The non volatile NAND-based flash memory, on which the SATA SSDs are based, is  raising an increasing interest for space applications too
  •  A number of radiation tests performed for Ground and Space Flight Missions have demonstrated a radiation tolerance order of tens of Krads that can results enough for LEO Missions also with significant duration
  • R&D activities are on-going to define powerful error-correction system to mitigate the possible failure of those memories  and allow them to be reliable over a long period of time
  •  Space applications could benefit from the adoption of the SATA protocol as interface layer between the host controller and the mass memory module
  •  As first step, TSD has proposed the development of a LEON based CPU implementing the SATA controller in the same FPGA that hosts the LEON Soft IP core; such CPU board could initially be used, in combination with ruggedized COTS SATA SSDs, for short missions and in general for missions with low radiation tolerance requirements 
  •  
  • SATA SSDs specifically designed for the military market with special assembly options suitable for space applications are to-day available as COTS
  •  
  • In a subsequent step, in order to provide a complete radiation tolerant SATA storage solution, a solid state qualified storage device with SATA interface will be designed as a follow-up R&D activity
 

  CCSM Module

  • The module realized by TSD is named CCSM (Control, Communication and Storage Module)  and consists of a motherboard and a daughter board that physically hosts the SATA SSD.
  • The CCSM has been designed by adopting components already available in radiation tolerant version, like the Xilink Virtex-5 FPGA for which it is available the Virtex-5QV version that represents  the industry's first high performance rad-hard reprogrammable FPGA for processing-intensive space systems.
  •  Thanks to its very  high density and performances, the Virtex-5 FPGA is employed as a complex SoC (System-on-Chip), hosting the LEON3 CPU and all the foreseen peripherals.
  

CCSM Specification

Interfaces

  • Redundant CAN Bus I/F
  • 3 x RS-644 LVDS SpaceWire up to 50 Mbit/s
  • 5 x Channel Link Deserializer inputs @ ~1.5Gbit/s
  • 1 x Channel Link Serializer output @ ~ 1.5 Gbit/s
  • 1 x CameraLink I/F @ ~ 2 Gbit/s for the reception of the video data
  • 3 x SATA I/Fs
  • 1 x RS422 Debug I/F
  • 1 x Ethernet I/F

Internal Storage

  • Storage Capacity up to 64 GByte
  • Storage Data Rate up to 960 Mbit/s

External Storage

  • Storage Capacity up to 128 GByte
  • Storage Data Rate up to 1680 Mbit/s

Throughput

  • Overall Raw Data Acquisition Rate: 9.5 Gbit/s
  • DDR2 Memory Read/Write rate: 8.8 Gbit/s
  • Overall storage rate: 2.64 Gbit/s

Power Input

  • Input Voltage:  5 VDC

 

  • Input Current:   2.2 A

 

  • Power Consumption: 11 W during the sustained read/write operation

Size

  • 125 x 100 x 26 [mm]

Mass

  • 243[g]

Environment

  • Operating Temperature: -40÷85 [°C]

 

  • Non-Operating Temperature Range: -55÷125 [°C]

Radiation Tolerance

Total Dose:

  • 20KRad at least with ITAR free components

  • Higher radiation tolerance version available with ITAR components