MC68HC708XL36 FREESCALE [Freescale Semiconductor, Inc], MC68HC708XL36 Datasheet - Page 77

• Manufacturer Part Number: MC68HC708XL36
• Description: HCMOS Microcontroller Unit
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

External Interrupt Module (IRQ)
Wait Mode
Stop Mode
Keyboard Interrupt Module (KB)
Wait Mode
Stop Mode
5-lp24_e
MOTOROLA
Entering stop mode when a DMA channel is enabled may fail to clear the
interrupt mask (I bit) in the condition code register. To make sure the I
bit is cleared when entering stop mode:
The IRQ module remains active in wait mode. Clearing the IMASK1 or
IMASK2 bit in the IRQ status and control register enables IRQ1 or IRQ2
CPU interrupt requests to bring the MCU out of wait mode.
The IRQ module remains active in stop mode. Clearing the IMASK1 or
IMASK2 bit in the IRQ status and control register enables IRQ1 or IRQ2
CPU interrupt requests to bring the MCU out of stop mode.
The keyboard module remains active in wait mode. Clearing the
IMASKK bit in the keyboard status and control register enables keyboard
interrupt requests to bring the MCU out of wait mode.
The keyboard module remains active in stop mode. Clearing the
IMASKK bit in the keyboard status and control register enables keyboard
interrupt requests to bring the MCU out of stop mode.
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Freescale Semiconductor, Inc.
For More Information On This Product,
Before executing the STOP instruction, wait until any current DMA
transfer is complete. Then disable DMA transfers by clearing bits
TEC[2:0] in DMA control register 1.
Or,
Execute the clear-interrupt-mask instruction (CLI) before entering
stop mode.
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Low-Power Modes
External Interrupt Module (IRQ)
Low-Power Modes
MC68HC708XL36
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