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ISUAL Data Processing Unit (DPU)

ISUAL Data Processing Unit (DPU). C. Ingraham. DPU Functions. Receives Commands Sends Status Sends Telemetry Manages Mass Memory Manages Power System Controls Imager Controls Spectrophotometer Commands Array Photometer Manages Instrument Heaters. DPU Block Diagram. DPU Block Diagram.

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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

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