RT PolarFire FPGA support the multi-image IAP use model, which allows up to 255 images to be stored in the SPI flash memory. The image descriptor pointers are in Sector 0 of the SPI flash memory. The device can be programmed with any image; however, if the program fails, the device is programmed with image 0. The programming image pointer next to the image 0 pointer must be null (empty slot). This model is used when the device needs to be updated with a specific image from among the available images. The following figure shows the multi-image use model.
Figure 1. Multi-Image Use Model
