HC705RC16GRSSLASHD datasheet(51/120 Pages) NXP

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MC68HC705RC16 — Rev. 3.0

General Release Specification

Low-Power Modes

General Release Specification — MC68HC705RC16

Section 6. Low-Power Modes

6.1 Contents

6.2

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .51

6.3

Stop Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .51

6.4

Stop Recovery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52

6.5

Wait Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52

6.6

Low-Power Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .53

6.2 Introduction

This section describes the low-power modes.

6.3 Stop Mode

The STOP instruction places the MCU in its lowest power-consumption

mode. In stop mode, the internal oscillator is turned off, halting all

internal processing, including timer operation.

During stop mode, the CTCSR ($08) bits are altered to remove any

pending timer interrupt request and to disable any further timer

interrupts. The timer prescaler is cleared. The I bit in the CCR is cleared

to enable external interrupts. All other registers and memory remain

unaltered. All input/output lines remain unchanged.

NOTE:

The EIMSK bit is not cleared automatically by the execution of a STOP

instruction. Care should be taken to clear this bit before entering stop

mode.

Freescale Semiconductor, Inc.

For More Information On This Product,

Go to: www.freescale.com

HC705RC16GRS/D Datasheet(PDF) 51 Page - NXP Semiconductors