MC68HC705V12CFN MOTOROLA [Motorola, Inc], MC68HC705V12CFN Datasheet - Page 75

• Manufacturer Part Number: MC68HC705V12CFN
• Description: The Motorola microcontroller
• Manufacturer: MOTOROLA [Motorola, Inc]

6.1 Contents
6.2 Introduction
6.3 STOP Instruction
MC68HC705V12
MOTOROLA
Advance Information — MC68HC705V12
—
Rev. 3.0
6.2
6.3
6.4
6.5
6.6
The MC68HC705V12 is capable of running in one of several low-power
operational modes. The WAIT and STOP instructions provide two
modes that reduce the power required for the MCU by stopping various
internal clocks and/or the on-chip oscillator. The STOP and WAIT
instructions are not normally used if the computer operating properly
(COP) watchdog timer is enabled. A programmable mask option is
provided to convert the STOP instruction to an internal reset. The flow of
the stop and wait modes is shown in
The STOP instruction can result in one of two operations depending on
the state of the MOR[STOPE] bit:
•
•
If the STOP option is enabled, the STOP instruction operates like
the STOP in normal MC68HC05 Family members and places the
device in the low-power stop mode.
If the STOP option is disabled, the STOP instruction will cause a
chip reset when executed.
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .75
STOP Instruction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .75
Stop Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .76
WAIT Instruction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .79
Data-Retention Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .79
Low-Power Modes
Section 6. Low-Power Modes
Figure
6-2.
Advance Information
75