h8s-2628 Renesas Electronics Corporation., h8s-2628 Datasheet - Page 551

• Manufacturer Part Number: h8s-2628
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
• Manufacturer: Renesas Electronics Corporation.

21.4.4
Figure 21.3 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.
Software Standby Mode Application Example
Oscillator
NMI
NMIEG
SSBY
Figure 21.3 Software Standby Mode Application Example
NMI exception
handling
NMIEG = 1
SSBY = 1
SLEEP instruction
Software standby mode
(power-down mode)
Rev. 3.00 Oct 04, 2005 page 511 of 598
stabilization
Oscillation
time t
Section 21 Power-Down Modes
OSC2
NMI exception
handling
REJ09B0155-0300