3069RF-ZTAT Datasheet, PDF (717/1003 Pages) Renesas Technology Corp – RENESAS 16-BIT SINGLE-CHIP MICROCOMPUTER

Section 20 Power-Down State
20.1 Overview
The H8/3069R 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 16-bit timer, 8-bit timer, SCI0, SCI1, SCI2,
DMAC, DRAM interface, 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.
Rev. 5.0, 09/04, page 695 of 978