Detection time depends on user-adjustable touch parameters. Factory settings recognize touches in around 20ms. The corresponding serial response sends immediately if no commands are being executed. However, there is no guarantee since the screen could be performing some command when the unit is touched. The evaluation kit unit has a very responsive keyboard demo. However, the ultimate response time depends on how the unit is used.

Compressing bitmaps in our SLCD products allows you to save Flash memory space. The disadvantage is that compressed bitmaps display more slowly. To balance performance and Flash display storage, it is best to use the “Enable Bitmap Compression” checkbox in the BMPload application. For bitmaps that are large (i.e., cover the entire screen), or are re-drawn often, disable compression by inserting the string “.unc” into the file name (e.g. “01_MyBitmap.unc.bmp”). This string tells the BMPload program not to compress this image. Background bitmaps for slider objects and meter objects and sliding graphics (“xio” command) need to be uncompressed. Using the strategy above should keep your application visually responsive while conserving Flash memory for future additional bitmaps.