Section 19 Power-Down State; Overview - Hitachi H8/3006 Hardware Manual

Section 19 Power-Down State

19.1

Overview

The H8/3006 and H8/3007 have 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 16-bit timer, 8-bit timer, SCI0, SCI1, SCI2,
DMAC, DRAM interface, and A/D converter.
Table 19.1 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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