R5F2L3ACBNFP datasheet(191/848 Pages) RENESAS

191 / 848 page

REJ09B0441-0010 Rev.0.10

Jul 30, 2008

Page 155 of 809

Under development Preliminary specification

Specifications in this manual are tentative and subject to change.

10. Power Control

R8C/L35A Group, R8C/L36A Group, R8C/L38A Group, R8C/L3AA Group,

R8C/L35B Group, R8C/L36B Group, R8C/L38B Group, R8C/L3AB Group

10.4

Wait Mode

Since the CPU clock stops in wait mode, CPU operation using the CPU clock and watchdog timer operation with

count source protection mode disabled are halted. However, the XIN clock, XCIN clock, and on-chip oscillator

clock do not stop, so peripheral functions using these clocks continue operating.

10.4.1

Peripheral Function Clock Stop Function

The peripheral function clock to stop in wait mode can be selected by setting bits CM01 and CM02 in the CM0

applications.

10.4.2

Entering Wait Mode

The MCU enters wait mode by executing the WAIT instruction or setting the CM30 bit in the CM3 register to 1

(MCU enters wait mode).

When the OCD2 bit in the OCD register is set to 1 (on-chip oscillator selected as system clock), set the OCD1

bit in the OCD register to 0 (oscillation stop detection interrupt disabled) before executing the WAIT

instruction or setting the CM30 bit in the CM3 register to 1 (MCU enters wait mode).

If the MCU enters wait mode while the OCD1 bit is set to 1 (oscillation stop detection interrupt enabled),

current consumption is not reduced because the CPU clock does not stop.

10.4.3

Pin Status in Wait Mode

Each I/O port retains its states immediately before the MCU enters wait mode.

R5F2L3ACBNFP Datasheet(PDF) 191 Page - Renesas Technology Corp