National Semiconductor's New Mobile I/O Companions Unburden Host Processor to Ease Handheld Device Design
The LM8322 and LM8333 off-the-shelf integrated circuits include embedded key-scan functions, I/O expansion and light-emitting diode (LED) control capabilities.
A new mobile input/output (I/O) companion family from National Semiconductor Corporation (NYSE: NSM) offers designers an easy way to expand system functionality in portable products such as personal digital assistants, media players, instrumentation, medical equipment and mobile handsets.
Portable device manufacturers continue to differentiate their products through added features such as custom keyboards or special lighting. This increasingly requires a more flexible design approach to unburden the device’s main or host processor and reduce design time. National’s LM8322and LM8333mobile I/O companions allow designers to re-partition their systems by offloading tasks from the processor and adding features through a reconfigurable set of simple commands.
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