Space Application Development Board

The Space Application Development Board (SADB-C6727B) enables developers to implement systems using standard and custom algorithms on processor hardware similar to what would be deployed for spacecraft in a fully radiation hardened (rad-hard) design.  The SADB-C6727B is devised to be similar to a space qualified rad-hardened system design using the TI SMV320C6727B-SP DSP and high-rel memories (SRAM, SDRAM, NOR FLASH) from Cobham.  The VOCAL SADB-C6727B development board does not use these high reliability space qualified components but rather implements various common bus widths and memory types/speeds for algorithm development and performance evaluation.

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Space Application Development Board

Audio inputs are handled by a TI ADS1278 high speed multichannel analog-to-digital converter (ADC) which has a variant qualified for space operation.  Audio outputs may be generated from digital signal Pulse Density Modulation (PDM) or Pulse Width Modulation (PWM) signals to avoid the need for a space qualified digital-to-analog converter (DAC) hardware or a traditional audio codec circuit.  A commercial grade AIC3106 audio codec is provided for algorithm development and for comparison of audio performance to PDM/PWM generated audio signals.  Digital microphones (PDM or I2S formats) can be sampled by the processor directly or by the AIC3106 audio codec (PDM format only).  Digital audio inputs/outputs can also be connected to other processors (using the McASP signals directly).

 

Both SRAM and SDRAM memories are supported via configuration resistors to allow for developing and benchmarking algorithms using either 16-bit wide or 32-bit wide busses (also via configuration resistors).  Similarly the parallel NOR flash can operate with either 8-bit or 16- bits busses.  Large SDRAM can be easily accessed while the high address bits of SRAM and FLASH are page addressed via processor GPIO signals.  Both the parallel NOR flash and an I2C EEPROM may be used a processor boot devices.

 

The Ethernet MAC/PHY connects via SPI and is used to simulate off-processor communications.  This is not likely to be directly used in space environments but can be used to approximate an Ethernet/IP based communications network.  A serial UART connected via I2C is used for diagnostic/development purposes.  JTAG is also supported but generally is insufficient for monitoring a real-time running system which is why UART serial data is supported.

The Ethernet MAC/PHY connects via SPI and is used to simulate off-processor communications.  This is not likely to be directly used in space environments but can be used to approximate an Ethernet/IP based communications network.  A serial UART connected via I2C is used for diagnostic/development purposes.  JTAG is also supported but generally is insufficient for monitoring a real-time running system which is why UART serial data is supported.