r4f2426 Renesas Electronics Corporation., r4f2426 Datasheet - Page 1148

• Manufacturer Part Number: r4f2426
• Description: 16-bit Single-chip Microcomputer H8s Family / H8s/2400 Series
• Manufacturer: Renesas Electronics Corporation.

Section 24 Power-Down Modes
24.5
24.5.1
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.
24.5.2
Current dissipation increases during the oscillation stabilization standby period.
24.5.3
Depending on the operating status of the EXDMAC, DMAC, or DTC, the MSTP14 to MSTP13
and may not be set to 1. Setting of the EXDMAC, DMAC, or DTC module stop mode should be
carried out only when the respective module is not activated.
For details, see section 8, EXDMA Controller (EXDMAC), section 7, DMA Controller (DMAC),
and section 9, Data Transfer Controller (DTC).
Note: The EXDMAC is not supported by the H8S/2424 group.
24.5.4
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: The EXDMAC is not supported by the H8S/2424 group.
24.5.5
MSTPCR, EXMSTPCR, and RMMSTPCR should only be written to by the CPU.
Rev. 1.00 Sep. 19, 2008 Page 1120 of 1270
REJ09B0466-0100
Usage Notes
I/O Port Status
Current Dissipation during Oscillation Stabilization Standby Period
EXDMAC, DMAC, and DTC Module Stop
On-Chip Peripheral Module Interrupts
Writing to MSTPCR, EXMSTPCR, and RMMSTPCR