HD6433044 Datasheet, PDF (650/867 Pages) Hitachi Semiconductor – Hitachi Single-Chip Microcomputer

Section 20 Power-Down State
20.1 Overview
The H8/3048 Series has a power-down state that greatly reduces power consumption by halting
the CPU, and a module standby function that reduces power consumption by selectively halting
on-chip modules.
The power-down state includes the following three modes:
• Sleep mode
• Software standby mode
• Hardware standby mode
The module standby function can halt on-chip supporting modules independently of the power-
down state. The modules that can be halted are the ITU, SCI0, SCI1, DMAC, refresh controller,
and A/D converter.
Table 20-1 indicates the methods of entering and exiting the power-down modes and module
standby mode, and gives the status of the CPU and on-chip supporting modules in each mode.
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