Controller using intermittent information

摘要

This controller is used in a system in which initiators and targets are connected via distributed buses to control transmission timing of an access request received from the initiators. The controller stores intermittent information including information about an intermittent period in which interference between packets can be restricted and bus operating frequency information indicating a bus operating frequency at which real-time performance is guaranteed for each initiator and which has been generated based on system configuration information and flow configuration information indicating, on a flow basis, a specification required for each initiator to access the target. The controller includes a clock generator; communications circuitry; and transmission interval setting circuitry which sets a time to send transmission permission responsive to a transmission request based on the intermittent period, a time when the transmission request is detected, and a previous transmission time.

主权项

1. A controller for use in a system in which initiators and targets are connected together via distributed buses to control transmission timing of an access request that has been received from any of the initiators through the buses, the controller comprising:
an intermittent information storage configured to store intermittent period information that has been generated based on system configuration information about the system's configuration and flow configuration information indicating, on a flow basis, a specification required for each said initiator to access one of the targets; communications circuitry configured to obtain a clock signal to be driven at a bus operating frequency that guarantees real-time performance for each said initiator and that has been generated based on the system configuration information and the flow configuration information, configured to packetize data supplied from the initiator, configured to send a packet to a router and configured to record a transmission time of an input data in response to the clock signal; and transmission interval setting circuitry configured to set a time to send transmission permission responsive to a transmission request based on the intermittent period information, a time when the transmission request from the initiator is detected, and a previous transmission time.