Usage Notes - Renesas H8S/2319 series Hardware Manual

Oscillator
φ
NMI
NMIEG
SSBY
Figure 19-2 Software Standby Mode Application Example
19.6.5

Usage Notes

I/O Port Status: In software standby mode, I/O port states are retained. If the OPE bit is set to 1,
the address bus and bus control signal output is also retained. Therefore, there is no reduction in
current dissipation for the output current when a high-level signal is output.
Current Dissipation during Oscillation Stabilization Wait Period: Current dissipation
increases during the oscillation stabilization wait period.
NMI exception Software standby mode
handling (power-down mode)
NMIEG=1
SSBY=1
SLEEP instruction
NMI exception
Oscillation
handling
stabilization
time t
OSC2
Rev. 5.00, 12/03, page 789 of 1088