M68ICS08GR datasheet(49/408 Pages) FREESCALE

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MC68HC908GR8 — Rev 4.0

Technical Data

MOTOROLA

Low Power Modes

Technical Data — MC68HC908GR8

Section 3. Low Power Modes

3.1 Contents

3.2

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

3.3

Analog-to-Digital Converter (ADC) . . . . . . . . . . . . . . . . . . . . . . 50

3.4

Break Module (BRK). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

3.5

Central Processor Unit (CPU). . . . . . . . . . . . . . . . . . . . . . . . . . 51

3.6

Clock Generator Module (CGM) . . . . . . . . . . . . . . . . . . . . . . . . 52

3.7

Computer Operating Properly Module (COP). . . . . . . . . . . . . . 52

3.8

External Interrupt Module (IRQ) . . . . . . . . . . . . . . . . . . . . . . . . 53

3.9

Keyboard Interrupt Module (KBI) . . . . . . . . . . . . . . . . . . . . . . . 53

3.10

Low-Voltage Inhibit Module (LVI) . . . . . . . . . . . . . . . . . . . . . . . 54

3.11

Serial Communications Interface Module (SCI) . . . . . . . . . . . . 54

3.12

Serial Peripheral Interface Module (SPI) . . . . . . . . . . . . . . . . . 55

3.13

Timer Interface Module (TIM1 and TIM2) . . . . . . . . . . . . . . . . . 55

3.14

Timebase Module (TBM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

3.15

Exiting Wait Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

3.16

Exiting Stop Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

3.2 Introduction

The MCU may enter two low-power modes: wait mode and stop mode.

They are common to all HC08 MCUs and are entered through instruction

execution. This section describes how each module acts in the low-

power modes.

Freescale Semiconductor, Inc.

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