MC68HC705K1 Datasheet, PDF (57/140 Pages) Freescale Semiconductor, Inc – HCMOS Microcontroller Unit

Freescale Semiconductor, Inc.
Technical Data — MC68HC705K1
Section 6. Low-Power Modes
6.1 Contents
6.2 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .57
6.3 Stop Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .57
6.4 Wait Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .58
6.5 Halt Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .59
6.6 Data-Retention Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .61
6.2 Introduction
This section describes the four low-power modes:
• Stop mode
• Wait mode
• Halt mode
• Data-retention mode
6.3 Stop Mode
If the SWAIT bit in the mask option register (MOR) is programmed to a
logic 0, the STOP instruction puts the microcontroller unit (MCU) in its
lowest power-consumption mode and has these effects on the MCU:
• Clears TOF and RTIF, the timer interrupt flags in the timer status
and control register, removing any pending timer interrupts
• Clears TOIE and RTIE, the timer interrupt enable bits in the timer
status and control register, disabling further timer interrupts
• Clears the multifunction timer counter register
MC68HC705K1 — Rev. 2.0
Low-Power Modes
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Technical Data