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DS2302 Direct Digital Synthesis Board

Real-time signal generation with high accuracy

With the DS2302 Direct Digital Synthesis Board, you can simulate complex sensor signal waveforms for testing electronic control units (ECUs). Typical examples are signals such as angle-based crankshaft or camshaft pulses.

  • Flexible sensor signal simulation with up to 6 channels
  • Fast analog output on up to six 16-bit DACs
  • Angular processing unit (APU) slave interface for each channel

Key Benefits

The DS2302 lets you simulate complex sensor signal waveforms for testing electronic control units (ECUs). The board meets tough requirements regarding complexity, flexibility, and resolution. The DS2302 is equipped with six digital signal processors (DSPs) and designed for fast, flexible waveform generation. It computes each signal sample right when it is required and outputs it immediately. The signal parameters can easily be changed on the fly by a master processor board. The DS2302 C functions let you exchange data between your main application and an application running on one of the six DSPs. Communication runs via the dual-port memories of the DS2302.

Application Areas

To test an ECU at its limits, even interferences such as noise or spikes often need to be simulated. For example, in automotive hardware-in-the-loop applications, signals such as crankshaft or camshaft pulses have to be generated as angle-based signals to achieve the highest possible accuracy. Signal variables, such as engine speed, must be modified in real time. The Fast Analog Capturing Module is used to capture injection control voltage and calculate the injection quantity for piezo actuators of SI engines.

Parameter Specification
General
  • 6 independent direct digital synthesis channels
Processor Digital signal processor (DSP)
  • Texas Instruments TMS320VC33 floating-point DSP
  • 150 MFLOPS
  • 13.3 ns cycle time
Memory Dual-port memory (DPMEM)
  • 16 K x 32-bit true dual-port RAM per channel
  • Used for program download and to read or write parameters (e.g., for communi­cation between DSPs)
DSP interrupts
  • Onboard I/O (e.g., timer or DMA), external, other DSP channels
Interrupt controller
  • One interrupt to PHS-bus master per DSP channel
Plug-on modules
  • Plug-on DAC module (optional)
  • Plug-on ADC module for fast analog capturing (optional)
Digital I/O Voltage range
  • TTL input/output levels
Output current
  • Max. -800 µA/+1.5 mA
Further details
  • 7 digital I/O lines per DSP
  • Programmable as input or output
  • One line programmable as external interrupt input
  • APU (angular processing unit) slave interface for each channel
Physical connections
  • 44-pin female high-density Sub-D output connector
Physical characteristics Physical size
  • 338 x 114 x 20 mm (13.3 x 4.5 x 0.8 in)
Ambient temperature
  • 0 … 70 ºC (32 … 158 ºF)
Power supply
  • +5 V ±5%, 4.0 A (with 6 DAC modules inserted)

Real-Time Interface (RTI) Automatic implementation of MATLAB®/Simulink®/Stateflow® models on dSPACE hardware Connector and LED Panels Easy access to I/O signals with BNC and Sub-D connectors
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