Section 21 Power-Down State; Overview - Renesas F-ZTAT H8 Series Hardware Manual

Section 21 Power-Down State

Section 21 Power-Down State
21.1

Overview

The H8/3048 Group 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 21.1 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.
Rev. 7.00 Sep 21, 2005 page 663 of 878
REJ09B0259-0700