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MC908GR4MDWR2 Datasheet(PDF) 53 Page - Motorola, Inc |
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MC908GR4MDWR2 Datasheet(HTML) 53 Page - Motorola, Inc |
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53 / 408 page  Low Power Modes External Interrupt Module (IRQ) MC68HC908GR8 — Rev 4.0 Technical Data MOTOROLA Low Power Modes 53 3.7.2 Stop Mode Stop mode turns off the CGMXCLK input to the COP and clears the COP prescaler. Service the COP immediately before entering or after exiting stop mode to ensure a full COP timeout period after entering or exiting stop mode. The STOP bit in the configuration register (CONFIG) enables the STOP instruction. To prevent inadvertently turning off the COP with a STOP instruction, disable the STOP instruction by clearing the STOP bit. 3.8 External Interrupt Module (IRQ) 3.8.1 Wait Mode The IRQ module remains active in wait mode. Clearing the IMASK1 bit in the IRQ status and control register enables IRQ CPU interrupt requests to bring the MCU out of wait mode. 3.8.2 Stop Mode The IRQ module remains active in stop mode. Clearing the IMASK1 bit in the IRQ status and control register enables IRQ CPU interrupt requests to bring the MCU out of stop mode. 3.9 Keyboard Interrupt Module (KBI) 3.9.1 Wait 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. Freescale Semiconductor, Inc. For More Information On This Product, Go to: www.freescale.com |
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