HD6417144 RENESAS [Renesas Technology Corp], HD6417144 Datasheet - Page 774

• Manufacturer Part Number: HD6417144
• Description: 32-Bit RISC Microcomputer SuperHTM RISC engine Family/SH7144 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

24. Power-Down Modes
24.3.3
Module standby mode can be set for individual on-chip peripheral functions.
When the corresponding MSTP bit in MSTCR is set to 1, module operation stops at the end of the
bus cycle and a transition is made to module standby mode. The CPU continues operating
independently.
When the corresponding MSTP bit is cleared to 0, module standby mode is cleared and the
module starts operating at the end of the bus cycle. In some of the modules that have entered
module standby mode, register values are initialized. Therefore, set registers again when operating
the modules.
After reset clearing, the I
The modules of registers in module standby mode cannot be read or written to.
Rev.4.00 Mar. 27, 2008 Page 730 of 882
REJ09B0108-0400
Oscillator
CK
NMI input
NMIE bit
SSBY bit
LSI state
Figure 24.1 NMI Timing in Software Standby Mode (Application Example)
Module Standby Mode
execution state
Program
2
C, SCI, MTU, CMT, and A/D converter are in module standby mode.
exception
handling
NMI
service routine
Exception
standby mode
Software
Oscillation
start time
Oscillation stabilization
time
setting time
WDT
NMI exception
handling