HD64F38602R Datasheet, PDF (109/552 Pages) Renesas Technology Corp – Renesas 16-Bit Single-Chip Microcomputer

Section 5 Power-Down Modes
Section 5 Power-Down Modes
This LSI has eight modes of operation after a reset. These include a normal active (high-speed)
mode and seven power-down modes, in which power consumption is significantly reduced. The
module standby function reduces power consumption by selectively halting on-chip module
functions.
• Active (medium-speed) mode
The CPU and all on-chip peripheral modules are operable on the system clock. The system
clock frequency can be selected from φ_OSC/8, φ_OSC/16, φ_OSC/32, and φ_OSC/64.
• Subactive mode
The CPU and all on-chip peripheral modules are operable on the subclock. The subclock
frequency can be selected from φ_W, φ_W/2, φ_W/4, and φ_W/8.
• Sleep (high-speed) mode
The CPU halts. On-chip peripheral modules are operable on the system clock.
• Sleep (medium-speed) mode
The CPU halts. On-chip peripheral modules are operable on the system clock. The system
clock frequency can be selected from φ_OSC/8, φ_OSC/16, φ_OSC/32, and φ_OSC/64.
• Subsleep mode
The CPU halts. The on-chip peripheral modules are operable on the subclock. The subclock
frequency can be selected from φ_W, φ_W/2, φ_W/4, and φ_W/8.
• Watch mode
The CPU halts. The on-chip peripheral modules are operable on the subclock.
• Standby mode
The CPU and all on-chip peripheral modules halt.
• Module standby function
Independent of the above modes, power consumption can be reduced by halting on-chip
peripheral modules that are not used in module units.
Note: In this manual, active (high-speed) mode and active (medium-speed) mode are collectively
called active mode.
Rev. 3.00 May 15, 2007 Page 77 of 516
REJ09B0152-0300