DLPU082B August 2021 – August 2022 DLPC7540
GPIO_58 acts as HOST_IRQ/SYSTEM_BUSY signal, configured as open drain GPIO from the controller side. The user can assign a different pin for this purpose using DLP Composer tool. The GPIO indicates when the controller is free or busy. During power-on-reset, the front-end communication device must wait until the signal goes to LOW state when host processor is available to receive commands. When the signal remains continuously HIGH, this indicates problem with controller boot-sequence. In this case it is important that the issue resolved before proceeding.