M16C65 Datasheet, PDF (184/829 Pages) Renesas Technology Corp – RENESAS MCU M16C FAMILY / M16C/60

Under development
M16C/65 Group
Preliminary Specification
This is a preliminary specification and is subject to change.
9. Power Control
9.5 Reducing Power Consumption
To reduce power consumption, refer to the following descriptions when designing a system or writing
a program.
9.5.1 Ports
The MCU retains the state of each I/O port even when it enters wait mode or stop mode. A current flows
in the active output ports. A shoot-through current flows to the input ports in the high-impedance state.
When entering wait mode or stop mode, set unused ports to input and stabilize the potential.
9.5.2 A/D Converter
When not executing A/D conversion, set the ADSTBY bit in the ADCON1 register to 0 (A/D operation
stop). When executing A/D conversion, start the A/D conversion after setting the ADSTBY bit to 1 (A/D
operation enabled) and waiting 1 φAD cycle or more.
9.5.3 D/A Converter
When not executing D/A conversion, set the DAiE bit (i = 0, 1) in the DACON register to 0 (output
inhibited) and the DAi register to 00h.
9.5.4 Stopping Peripheral Functions
Use the CM02 bit in the CM0 register to stop the unnecessary peripheral functions while in wait mode.
9.5.5 Switching the Oscillation-Driving Capacity
Set the driving capacity to low when oscillation is stable.
REJ09B0484-0030 Rev.0.30 Sep 09, 2008
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