RX610 Group
8. Low Power Consumption
R01UH0032EJ0120 Rev.1.20
Page 175 of 1006
Feb 20, 2013
STS[4:0] Bits (Standby Timer Select)
These bits select the time for this LSI to wait until the clock is stabilized when software standby mode is canceled by an
external interrupt.
In the case of crystal oscillation, see table 8.4 and make a selection according to the operating frequency so that the
waiting time is no less than the oscillation settling time. When an external clock is used, the PLL circuit settling time is
necessary. Select a waiting time referring to table 8.4.
During the oscillation settling time, the standby timer is counted on the peripheral module clock (PCLK) frequency. Note
this in multi-clock mode.
OPE Bit (Output Port Enable)
The OPE bit specifies whether to retain the output of the address bus and bus control signals (CS0# to CS7#, RD#, WR0#,
WR1#, WR#, BC0#, and BC1#) in software standby mode or deep software standby mode, or to set the output to the
high-impedance state.
SSBY Bit (Software Standby)
The SSBY bit specifies the transition destination after the WAIT instruction is executed.
When the SSBY bit is set to 0, the LSI enters either sleep mode or all-module clock stop mode after execution of the
WAIT instruction, according to the setting of the MSTPCRA and MSTPCRB registers. When the SSBY bit is set to 1,
the LSI enters software standby mode after execution of the WAIT instruction. In this case, when the DPSBY bit in
DPSBYCR is 1, the LSI enters deep software standby mode after software standby mode. For details, see section 8.5,
Low Power Consumption Modes.
This bit is not cleared to 0 when software standby mode is canceled by an external interrupt and the LSI enters normal
mode. Write 0 to this bit to clear.
When the WDT is used in watchdog timer mode, the setting of this bit is invalid and the LSI always enters sleep mode or
all-module clock stop mode after the WAIT instruction is executed.
Summary of Contents for RX600 Series
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