HD6413003RVF RENESAS [Renesas Technology Corp], HD6413003RVF Datasheet - Page 535
HD6413003RVF
Manufacturer Part Number
HD6413003RVF
Description
microcontroller (MCU)
Manufacturer
RENESAS [Renesas Technology Corp]
Datasheet
1.HD6413003RVF.pdf
(715 pages)
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17.4.4 Sample Application of Software Standby Mode
Figure 17-1 shows an example in which software standby mode is entered at the fall of NMI and
exited at the rise of NMI.
With the NMI edge select bit (NMIEG) cleared to 0 in SYSCR (selecting the falling edge), an
NMI interrupt occurs. Next the NMIEG bit is set to 1 (selecting the rising edge) and the SSBY bit
is set to 1; then the SLEEP instruction is executed to enter software standby mode.
Software standby mode is exited at the next rising edge of the NMI signal .
17.4.5 Note
The I/O ports retain their existing states in software standby mode. If a port is in the high output
state, its output current is not reduced.
Clock
oscillator
ø
NMI
NMIEG
SSBY
Figure 17-1 NMI Timing for Software Standby Mode (Example)
NMI interrupt
handler
NMIEG = 1
SSBY = 1
SLEEP
instruction
Software standby
mode (power-
down state)
517
Oscillator
settling time
(t
osc2
)
NMI exception
handling
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