The C&DH unit provides the spacecraft control processing, data handling and storage, command decoding and telemetry gathering and encoding. The MDA C&DH unit is targeted for "Small-Sat" to "Medium-Sat" C&DH applications.

Command & Data Handling Unit

• Processor:
  • ESP032, radiation hardened processor based on the ERC32 processor, 16 MIPS at 20 MHz. Integer unit based on SPARC V7 RISC architecture, with powerful 32/64-bit Floating Point Unit. ESP032 card internal local 32-bit address bus/32-bit data bus for memory and I/O access. PCI 32-bits Bus Master interface to CPCI backplane on J1, and local CAN bus on J2.
• Boot/Program Memory:
  • 64KB Start-Up PROM for firmware boot
  • 2 MBytes 8-bits wide EEPROM with power-off mode
• Data/Program Memory:
  • 4 Mbytes 32-bits wide, rad tolerant SRAM with EDAC functionality
• Mass Memory (optional):
  • 1/2 G Bytes of SDRAM (Reed Solomon Error Correcting Code), and 8 Mbytes of EEPROM Non-Volatile Memory. Optional "Spacewire" node, providing bi-directional high speed serial access to memory arrays (LVDS Xcvrs accessible through a 9 pin micro-D front-panel connectors).
• Interfaces:
  • CAN 2.0 Bus Serial dual redundant bus at 1 Mb/s
  • MIL-STD-1553B C&DH Dual redundant 1553 Data Bus Controller (BC), for communication to the AOCS sub-systems and payload.
  • TTC-B-01 Serial ML16 and SD16 Telemetry and Tele-commands Interfaces
  • High speed serial 4 high speed duplex RS-422/485 COM ports (up to 2 Mb/s), FIFO buffered.
  • Low speed serial 4 UARTs, full-duplex, RS-422 Xcvrs, programmable baud rate to 115.2 Kbaud