Section 17 Power-Down State; Overview - Hitachi F-ZTAT H8/3039 Series Hardware Manual

Section 17 Power-Down State

17.1 Overview

This LSI has a power-down state that greatly reduces power consumption by halting CPU
functions, 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, and A/D converter.
Table 17-1 indicates the methods of entering and exiting these power-down modes and the status
of the CPU and on-chip supporting modules in each mode.
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