Hardware manual

Microcomputer Technical Q&A
56
Q&A No.: QAH8S-047
Category: Power-Down State
Subject: On-Chip Supporting Modules in Software Standby Mode
Question
What is the state of the on-chip supporting modules in software standby mode?
Answer
In the H8S Series, on-chip supporting module register contents are generally held in software
standby mode, and the contents of these registers do not have to be set again when software
standby mode is exited. However, some on-chip supporting modules are reset in software standby
mode. See the relevant hardware manual for details.
Example: In the H8S/2655 Series, the SCI is reset but the states of the other on-chip supporting
modules are held. (See table 21.1, Operating States, in section 21, Power-Down State,
in the hardware manual.)
Applicable Products
Applicability Series Applicability Series Applicability Series
Yes Entire H8S Series H8S/2655 H8S/2350
H8S/2355 H8S/2357 H8S/2345
H8S/2245 H8S/2148 H8S/2144
H8S/2138 H8S/2134 H8S/2128
H8S/2124 — — — —