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22.4
Usage Notes
22.4.1
I/O Port Status
In software standby mode, I/O port states are retained. Therefore, there is no reduction in current
dissipation for the output current when a high-level signal is output.
22.4.2
Current Dissipation during Oscillation Stabilization Standby Period
Current dissipation increases during the oscillation stabilization standby period.
22.4.3
DMAC/DTC Module Stop
Depending on the operating status of the DMAC or DTC, the MSTP14 to MSTP13 and may not
be set to 1. Setting of the DMAC or DTC module stop mode should be carried out only when the
respective module is not activated.
For details, refer to section 7, DMA Controller (DMAC), and section 8, Data Transfer Controller
(DTC).
Note: Not supported by the H8S/2366.
22.4.4
On-Chip Peripheral Module Interrupts
Relevant interrupt operations cannot be performed in module stop mode. Consequently, if module
stop mode is entered when an interrupt has been requested, it will not be possible to clear the CPU
interrupt source or the DMAC or DTC activation source.
Interrupts should therefore be disabled before entering module stop mode.
Note: Not supported by the H8S/2366.
22.4.5
Writing to MSTPCR, EXMSTPCR
MSTPCR and EXMSTPCR should only be written to by the CPU.
Rev. 2.00, 05/03, page 696 of 820
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