Data processor and control system
Provided are a data processor, and a control system, in which an interrupt controller and an event link controller are adopted. The event link controller responds to a generated event signal to output a start control signal for controlling start of an operation of a circuit module. The circuit module is able to generate an event signal. The event link controller generates the start control signal according to the correspondences between event signals and start control signals which are defined by event control information. The links between the event signals and start control signals can be prescribed by the event control information. Therefore, operations of circuit modules prescribed by such links can be controlled sequentially. The control neither involves save and return processes by CPU as in the interrupt processing, nor needs priority level control as executed on competing interrupt requests.
1. A data processor comprising:
a central processing unit which executes an instruction;
a plurality of circuit modules used by the central processing unit;
a first controller which sends a request for interruption to the central processing unit in response to a generated event signal; and
a second controller which outputs a start control signal to each of the first controller and the plurality of circuit modules in response to a generated event signal.
2. The data processor of claim 1 ,
wherein the central processing unit fetches a vector depending on a cause of interrupt, and runs a fetched interrupt-processing program.
3. The data processor of claim 1 ,
wherein the second controller has a rewritable memory circuit which is used to store event control information for determining which of the first controller and the plurality of circuit modules a start control signal is input to in response to an event signal received by the second controller.
4. A data processor comprising:
a central processing unit which executes an instruction;
a plurality of circuit modules which is used by the central processing unit;
a first controller which is configured to receive event signals from the plurality of circuit modules and to send a request for interrupt to the central processing unit; and
a second controller which is configured to receive event signals from the plurality of circuit modules and to send start control signals to the first controller and to the plurality of circuit modules,
wherein the plurality of circuit modules and the first controller are configured to start operations in response to respective ones of the start control signals.
5. The data processor of claim 4 ,
wherein the central processing unit fetches a vector depending on a cause of interrupt, and runs a fetched interrupt-processing program.
6. The data processor of claim 4 ,
wherein the second controller has a rewritable memory circuit which is used to store event control information for identifying a correspondence of the event signals received by the second controller to the start control signals.