ABB 07KT97F CPU GJR5253000R0270

The challenge of displaying dynamic images is to seamlessly change the image without the transient effects (artifacts) visible to the audience. The less data is sent to the driver every time the image changes, the easier it is to implement 07KT97F. The common artifacts on message boards are rolling ripples because the controller cannot move all displayed data fast enough. Minimizing data flow can minimize processor load and interface data rates can also be lower.

The advantage of using frames is that compared to changing the display image itself, flipping the display from one preloaded frame to another requires less control words to be sent to the driver. In order to change the frame, each 4-bit register of MAX6952 or MAX6953 is written to the user-defined font value corresponding to the new frame. This involves four writes to each MAX6952 or MAX6953 (one write to each digital register). On the contrary, directly changing the display image for 07KT97F will involve 20 writes per MAX6952 or MAX6953 (5 writes per 4 user-defined fonts). Of course, frame data still needs to be loaded for a period of time, so it is still necessary to perform these 20 writes on the 4 user-defined fonts. The best time to perform this operation is during the power on initialization period.