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SPI Bus

The VM2 supports the industry standard SPI bus, which can be used to control a wide range of devices including
  • 12-bit analogue input and output
  • 16-bit analogue input and output
  • SD/SDHC Memory cards, with some external circuitry
  • External USB disk drives, with some external circuitry
Multiple devices may be accessed on the SPI Bus 2 by gating the SPI Chip Select signals, e.g. with a 74HC138.