HD6417660 RENESAS [Renesas Technology Corp], HD6417660 Datasheet - Page 318

• Manufacturer Part Number: HD6417660
• Description: Renesas 32-Bit RISC Microcomputer
• Manufacturer: RENESAS [Renesas Technology Corp]

Relationship between Refresh Requests and Bus Cycles: If a refresh request occurs during bus
cycle execution, the refresh cycle must wait for the bus cycle to be completed. If a refresh request
occurs while the bus is released by the bus arbitration function, the refresh will not be executed
until the bus mastership is acquired. This LSI supports requests by the REFOUT pin for the bus
mastership while waiting for the refresh request. The REFOUT pin is asserted low until the bus
mastership is acquired.
If a new refresh request occurs while waiting for the previous refresh request, the previous refresh
request is deleted. To refresh correctly, a bus cycle longer than the refresh interval or the bus
mastership occupation must be prevented from occurring. If a bus mastership is requested during
self-refresh, the bus will not be released until the refresh is completed.
Rev. 1.00, 02/04, page 280 of 804