All PSoC Application Notes

AN2061: Using the PSoC to Drive the NKK Smartswitch

The NKK Smartswitch  is a single pole normally open pushbutton switch with an LCD screen mounted in the button head. The LCD is configured in the form of a 36-pixel (columns) by 24-pixel (rows) dot matrix with both red and green LEDs as a backlight. The interface to this device requires that the pixels for each row are shifted into the device and then each row is activated in sequence. The versatility of the peripheral set of the PSoC allows for a very simple hardware interface to the switch display. The software driver allows for bit manipulation individually and as a block, graphics and text presentation. It is also possible to set the color of the backlight, turn it and flash it. This design is not a stand-alone product. It is designed so that a complete application including the NKK Smartswitch can be hosted on the same. Such a project could be as simple as a serial interface or as complex as a Data Acquisition device.