Transmitting Display Data

In some examples, a system can include a microcontroller to initialize a counter to a predetermined value for each image component of an image data slice. The microcontroller can also store a number of received bits for each image component in a data structure and generate a pre-allocation signal indicating that additional bits of data for one of the image components are to be requested and stored in the data structure, wherein the pre-allocation signal is to be generated in response to determining that the counter is below the predetermined value. The microcontroller can also increase the counter by the predetermined value and transmit an address from the data structure to a display device in response to detecting a valid signal.