Abstract: The present disclosure provides a circuit and a method thereof for setting an SDRAM. The circuit includes at least one register and a controller circuit. The controller circuit is configured to: control the SDRAM to switch to an initialization setting mode, wherein the initialization setting mode is utilized for initialing the SDRAM; set value of the at least one register under the initialization setting mode; and set the SDRAM according to the value of the at least one register.

Abstract: An interrupt control system comprises: a central processing unit (CPU); a peripheral device; an interrupt controller, and an interrupt preprocessing circuit. The peripheral device optionally issues an interrupt request, and the interrupt controller generates and outputs a first interrupt request signal in response to the interrupt request. The interrupt preprocessing circuit generates and outputs two first interrupt acknowledgement signals to the interrupt controller in response to the first interrupt request signal. An interrupt vector is generated and outputted by the interrupt controller in response to the two first interrupt acknowledgement signals, and the interrupt vector is transmitted to the CPU through the interrupt preprocessing circuit.