H8S-2350 RENESAS [Renesas Technology Corp], H8S-2350 Datasheet - Page 731

• Manufacturer Part Number: H8S-2350
• Description: 16-Bit Single-Chip Microcomputer
• Manufacturer: RENESAS [Renesas Technology Corp]

20.6.4
Figure 20.2 shows an example in which a transition is made to software standby mode at the
falling edge on the NMI pin, and software standby mode is cleared at the rising edge on the NMI
pin.
In this example, an NMI interrupt is accepted with the NMIEG bit in SYSCR cleared to 0 (falling
edge specification), then the NMIEG bit is set to 1 (rising edge specification), the SSBY bit is set
to 1, and a SLEEP instruction is executed, causing a transition to software standby mode.
Software standby mode is then cleared at the rising edge on the NMI pin.
Oscillator
NMI
NMIEG
SSBY
Software Standby Mode Application Example
Figure 20.2 Software Standby Mode Application Example
NMI exception
handling
NMIEG = 1
SSBY = 1
SLEEP instruction
Software standby mode
(power-down mode)
Rev. 3.00 Sep 15, 2006 page 697 of 988
stabilization
Oscillation
time t
Section 20 Power-Down Modes
OSC2
NMI exception
REJ09B0330-0300
handling