Total Phase products are not authorized for use in life support devices or systems. Third Slave Select — an additional control line that allows slaves to be turned on and off via hardware control. The Cheetah adapter has built-in electrostatic discharge protection to prevent damage to the unit from high voltage static electricity. This provides two major benefits. Each element of the array is written with the port number. These common status responses are not reiterated for each function. In order to use the Cheetah API to send SPI data across the bus at high speed, commands are accumulated in a queue until a call is made to batch shift all of the queued commands.

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The queue has a queued delay after the last shifted byte, which is not permissible for asynchronous batch shifting. Open the Cheetah port, returning extended information in the supplied structure. After the driver has been installed, plugging in a Cheetah adapter for the first time will cause the cheetab to be installed and associated with the correct driver. The ribbon cable pin order follows the standard convention.

Cheetah SPI Host Adapter User Manual – Total Phase

Discount applied at checkout. When the Cheetah output enable is disabled, the device disconnects from the bus and each signal line is held at their current values with very weak internal pull-up or pull-down on the Cheetah device.

The best throughput can be achieved adapfer single transactions that transfer a large number of bytes at a time. Therefore, submitted batches should be long enough to bridge one, if not two, time slices. Instructions for using this utility cheerah be found below.


Since a new Cheetah DLL can be made available to an already compiled application, it is essential to ensure the compatibility of the Rosetta binding used by the application e. The Cheetah adapter is completely field-upgradable via USB.

Cheetah SPI Host Adapter

The Cheetah communications layer under Mac OS X does not require a specific kernel driver to operate. The phase option determines whether to sample or setup on the leading edge of the clock signal. Not sure which product is right for your needs? Currently the following languages are supported: This is the preferred way to support access to the Cheetah adapter such that the device is accessible by all of the users on the system upon device plug-in.

Second, if the application is performing its own functions between the submission of two batches, the length of the batches should be long enough to accommodate the CPU time of those functions. This helps reduce outgoing host to Cheetah bandwidth on the USB bus. If the handle argument is zero, the function will attempt to close all possible handles, thereby closing all open Cheetah adapters.

Cheetah SPI Host Adapter High Speed (total Phase) | eBay

After the operation completes, the batch queue is not cleared. This is an advanced feature that has traditionally only been needed by a few users; a detailed description is provided in the relevant API documentation. The Cheetah adapter is assigned a port on a sequential basis.


Data can be shifted at very high rates in full duplex. The Cheetah port number. This should equal count. Therefore, this function may be called repeatedly if the same sequence adaptter commands is to be shifted across the bus multiple times. Each device has its own SS line. The structure is zeroed before the open is attempted.

It is even possible that the application will not need multiple threads if it can process the data between steps 2 and 3 and guarantee the dpi will not take too long to process the incoming data. We also have a Quick Start Guide to help you get started.

This property holds even for very large transactions ranging from hundreds of kilobytes to many megabytes long. Total Phase products are not authorized for use in life support devices or systems.

The master pulls low on a slaves SS line to select hosf device for communication. The Cheetah DLL is designed for single-threaded environments so as to allow for maximum cross-platform compatibility.

Signal another thread to process this data. Finally, the asynchronous interface is only useful if the outgoing data of any asynchronous batch does not rely on the return MISO data of a previous asynchronous batch.