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Which SPI Host Adapter or Serial Platform can Easily Write/Read SPI Data that is Greater than 8 Bits per Word?

Question from the Customer:

I am using the Aardvark I2C/SPI Host Adapter in SPI slave mode, with MATLAB to interface with the Aardvark adapter. The master outputs a packet that we would like to read. But we aren’t able to read our entire packet, because it appears that the data output is limited to 8 bits. In the header file, the SPI slave read data output only is an 8-bit variable. Is there a way to work around this?

Response from Technical Support:

Thanks for your question! The Aardvark adapter supports 8-bit words and can transfer 8-bit SPI data without td delay, and multiple 8-bit SPI data with td delay.  To send data that is non-8 bit packets, we recommend the Promira Serial Platform.

Promira Serial Platform Figure 1: Promira Serial Platform

The Promira platform supports multiple 8-bit words as well as multiple non 8-bit words, which provides greater flexibility for interfacing with the more complex devices. You could find the Promira platform very useful for many projects – it provides many built-in features including:

  • Integrated level shifting from 0.9-3.3V (5V tolerant)
  • High-speed USB connectivity and Ethernet connectivity
  • Provides 200 mA to target devices
  • Scalability - SPI and I2C Active applications allow you to upgrade your Promira platform as needed; new applications will be released on a ongoing basis

Here is a summary of the SPI Active application features, which can be quickly and easily downloaded to the Promira platform.

Promira Applications Comparison Chart Figure 2: Comparison Chart,  Promira and Aardvark Features

Additional resources that you may find helpful include the following:

We hope this answers your questions. If you have other questions about our host adapters or other Total Phase products, feel free to email us at sales@totalphase.com, or if you already own one of our devices and have a technical question, please submit a request for technical support.