Parameter Measurement Information
Theparameter measurement information section of the data sheet illustrates the test loads and waveforms that are used when testing the device (see Figure below).
The parameter measurement information (PMI) section of a data sheet is a graphical illustration of the test conditions used to characterize a DSP device. Usually, this includes a load schematic, example waveforms with measurement points, and related notes. The PMI that is attached to each data sheet typically is a generic PMI for the entire DSP family, and may include additional information that is not used for that specific device. For example, the voltage waveforms for enable and disable times (which are used on devices with 3-state outputs) may be included in the data sheet of a device without 3-state outputs. Therefore, this is superfluous information for that device and can be disregarded. The PMI may include the test information for multiple Voltages in one page, with a table of test-load circuit and measurement point information, or the test information for each separate VCC range at which the device operates may be in separate PMI pages, in which case the VCC range will be stated at the top of the PMI illustration. Relevant load and test setup information also is included in the footnotes at the bottom of the PMI illustration.