LTDC back porch configuration register
| AVBP | accumulated Vertical back porch (in units of horizontal scan line) These bits define the accumulated vertical back porch width that includes the vertical synchronization and vertical back porch lines minus 1. The vertical back porch is the number of horizontal scan lines at a start of frame to the start of the first active scan line of the next frame. |
| AHBP | accumulated horizontal back porch (in units of pixel clock period) These bits define the accumulated horizontal back porch width that includes the horizontal synchronization and horizontal back porch pixels minus 1. The horizontal back porch is the period between horizontal synchronization going inactive and the start of the active display part of the next scan line. |