HD6413003RF Datasheet, PDF (190/715 Pages) Renesas Technology Corp – Microcontroller (MCU)

• 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.
ø
BREQ
BACK
Address
Strobe
Bus-released state Software standby mode
Figure 7-24 Contention between Bus-Released State and Software Standby Mode
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