AAC Microtec Sirius OBC User Manual
Also see for Sirius OBC: User manual
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Contents
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Document number 205065Version Rev EIssue date 2017-03-07Sirius OBC and TCM User Manualwww.aacmicrotec.com Page 8 of 1312. Equipment informationThe Sirius OBC and Sirius OBC products are depicted in Figure 3-1 and Figure 3-2.The Sirius products also include both a debugger interface for downloading and debuggingsoftware applications and a JTAG interface for programming the FPGA duringmanufacturing.The FPGA firmware implements a SoC centered around a 32 bit OpenRISC Fault Tolerantprocessor [RD1] running at a system frequency of 50 MHz and with the following set ofperipherals: Error manager, error handling, tracking and log of e.g. power loss and/or memoryerror detection. SDRAM 64 MB data + 64 MB EDAC running @100MHz Spacecraft Elapsed Timer (SCET), including a PPS (Pulse Per Second) timesynchronization interface for accurate time measurement with a resolution of 15 μs SpaceWire, including a three-port SpaceWire router, for communication withexternal peripheral units UARTs uses the RS422 and RS485 line drivers on the board with line driver modeset by software. GPIOs Watchdog, a fail-safe mechanism to prevent a system lockup System flash of 2 GB with EDAC-protection for storing boot images in multiplecopies Pulse command inputs for reset to a specific software image MRAM for storage of metadata and other data that requires a large number ofwrites that shall survive loss of powerFor the Sirius TCM the following additional peripherals are included in the SoC: CCSDS, communications IP. Mass memory of 16GB with EDAC-protection, NAND flash based, for storage ofmission critical data.For the Sirius OBC an Analog interface is included.The input power supply provided to the Sirius products shall be between +4.5 and +16 VDC.The power consumption is highly dependent on peripheral loads and ranges from 0.8 W to2 W.2.1. System Overview with peripheralsFigure 2-1 depicts a System-on-Chip (SoC) overview including the related peripherals of theSirius OBC and Sirius TCM products. The figure shows what parts that are included forwhich products. |
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