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ISUAL Data Processing Unit (DPU) - PowerPoint PPT Presentation

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ISUAL Data Processing Unit (DPU)
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  1. ISUAL Data Processing Unit (DPU) C. Ingraham NCKU UCB Tohoku

  2. DPU Functions • Receives Commands • Sends Status • Sends Telemetry • Manages Mass Memory • Manages Power System • Controls Imager • Controls Spectrophotometer • Commands Array Photometer • Manages Instrument Heaters NCKU UCB Tohoku

  3. DPU Block Diagram DPU Block Diagram SpacecraftInterface(RS-422) DPU Board 8085 CPU Science Telemetry Sci Telem To Imager MCP, Imager Phosphor, SP1-6 HVPS 4 PR HV Control (FPGA) SOH Telemetry Command Sts. 1 PR Daylight Sensor Command Rx Commands Diag. Port (EGSE) 1 PR To ImagerTo AP, SPTo DCM, PC Time Rx PPS CDI Sender 1 PR To ImagerTo SP 16 KB PROM STIM To DCM DCM Handshake 128 KB RAM 128 KB EEPROM To Mass Memory Mass Memory I/F NCKU UCB Tohoku

  4. DPU Interfaces • Science Telemetry to S/C • Commands from S/C • SOH to S/C • PPS from S/C • CDI Commands to Instruments, PC, MM • Stim Pulses to Instruments • Mass Memory Read/Write • HV Control (8 Supplies) • Power from PC NCKU UCB Tohoku

  5. DPU Development Status (1) • Breadboard Unit (BB) Built • Functions Implemented and Working: • CPU, PROM, SRAM, EEPROM, Debug Port • Spacecraft Interface: • Command, Status • PPS, Science Telemetry Simulator • CDI Command/Data Interface • Functions to be Implemented: • HV Control, Some LVPS Controls • MM Interface, Stim NCKU UCB Tohoku

  6. DPU Development Status (2) • Baseline Functioning with GSE • AEP Bus and Instrument Harness Defined • Ready for Test with Power Controller & LVPS • PCB Mechanical Outline Complete • PCB Design to start 1 April • All EEE Parts Selected • Most EEE Parts Ordered and Received • Remaining Flight Parts to be Ordered by 1 April NCKU UCB Tohoku

  7. DPU Development Status (3) • Released Drawings: • AEP Bus Definition (8662) • Instrument Harness Definition (8580) • DPU Breadboard Schematic (8578) • DPU Breadboard BOM (8581) • DPU PCB Outline (8505) • ISDPGLU Actel Package (8509) NCKU UCB Tohoku