Abstract: A microcontroller system includes at least one processor and at least one storage unit for storing data received from or to be sent to the processor. At least two read clients are provided in the processor for retrieving data from the storage unit, and at least one write client is provided in the processor for writing data in the storage unit. The system further includes a memory device provided in the storage unit for storing data, and an arbitration device provided in the storage unit for enabling access to the memory device by the read and the write client. The read clients each have a dedicated read address line connected to the arbitration device for sending a read address of read data to be retrieved from the memory device, and a shared read data bus connected to the memory device for receiving the read data from the read address.

Abstract: Apparatus for controlling atomic access to a memory includes an access request evaluator for receiving an atomic access request to an address in the memory from a client and determining whether to allow atomic access to the requested address. An access indicator indicates whether a select address is currently under atomic access in the memory, and an access release indicates whether the atomic access is completed at the select address. The access request evaluator enables the client atomic access to the requested address if the access indicator indicates that the requested address is currently not under atomic access.

Abstract: Apparatus for controlling input clock signals to a microprocessor includes a clock generator for generating the input clock signals to the microprocessor, and a clock controller for producing a control signal for disabling the clock generator from outputting the input clock signals to the microprocessor for a predetermined time. The clock generator resumes outputting the input clock signals to the microprocessor after the predetermined time.