PICMG single-board computer F75P

x86Intel Atom E6x0T seriesSATA

The F75P is a COTS safe computer with onboard functional safety that unites three CPUs on one 3U CompactPCI PlusIO card. It makes Intel Atom E6xx ("E600") performance with dual redundancy extremely compact, mainly targeting railway applications. Two independent Control Processors (CP) with independent DDR2 RAM and Flash and a supervision structure provide safety: For SIL 3 / SIL 4: With redundant software running on F75P and, e.g., with the software instances on the two CPs comparing their output. This way the board becomes a fail-silent subsystem, i.e. it can shut down in case of a fatal fault. For up to SIL 2: Using just one of the two CPs or using both CPs independently for different applications. This way on each CP a 1oo1D safety application up to SIL 2 can be realized. Its I/O Processor (IOP) is built up like a classic CompactPCI CPU board, including DDR2 RAM, front and rear I/O. The front connectors include VGA, two USB 2.0, and two 100-Mbit Ethernet channels. At the rear, the board provides another four USB 2.0, two Fast Ethernet ports, one 3-Gbit SATA and one PCI Express x1 link. These interfaces comply with the standardized pinout of CompactPCI PlusIO (PICMG 2.30). An onboard mSATA slot makes for scalable, robust mass storage. The intelligent board management controller of the IOP logs events such as reset, overvoltage or undervoltage in a non-volatile FRAM. The Control (CP) and I/O Processors (IOP) communicate via internal links provided by an FPGA. The CPs are designed to run a deterministic real-time operating system such as the QNX Neutrino RTOS Safe Kernel. It is also possible to implement diversitary software on both kernels.