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H8/3003 Datasheet(PDF) 190 Page - Renesas Technology Corp |
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H8/3003 Datasheet(HTML) 190 Page - Renesas Technology Corp |
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190 / 715 page  • If a bus cycle is prolonged by insertion of wait states, the first refresh request is held, as in the bus-released state. • If contention occurs between a transition to software standby mode and a bus request from an external bus master, the bus may be released for one state just before the transition to software standby mode (see figure 7-24). When using software standby mode, clear the BRLE bit to 0 in BRCR before executing the SLEEP instruction. If similar contention occurs in a transition to self-refresh mode, strobe waveforms may not be output correctly. This can also be prevented by clearing the BRLE bit to 0 in BRCR. Figure 7-24 Contention between Bus-Released State and Software Standby Mode ø Address Strobe BREQ BACK Bus-released state Software standby mode 172 |
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