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MC908GR4CFAR2 Datasheet(PDF) 55 Page - Freescale Semiconductor, Inc |
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MC908GR4CFAR2 Datasheet(HTML) 55 Page - Freescale Semiconductor, Inc |
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55 / 408 page  Low Power Modes Serial Peripheral Interface Module (SPI) MC68HC908GR8 — Rev 4.0 Technical Data MOTOROLA Low Power Modes 55 3.11.2 Stop Mode The SCI module is inactive in stop mode. The STOP instruction does not affect SCI register states. SCI module operation resumes after the MCU exits stop mode. Because the internal clock is inactive during stop mode, entering stop mode during an SCI transmission or reception results in invalid data. 3.12 Serial Peripheral Interface Module (SPI) 3.12.1 Wait Mode The SPI module remains active in wait mode. Any enabled CPU interrupt request from the SPI module can bring the MCU out of wait mode. If SPI module functions are not required during wait mode, reduce power consumption by disabling the SPI module before executing the WAIT instruction. 3.12.2 Stop Mode The SPI module is inactive in stop mode. The STOP instruction does not affect SPI register states. SPI operation resumes after an external interrupt. If stop mode is exited by reset, any transfer in progress is aborted, and the SPI is reset. 3.13 Timer Interface Module (TIM1 and TIM2) 3.13.1 Wait Mode The TIM remains active in wait mode. Any enabled CPU interrupt request from the TIM can bring the MCU out of wait mode. If TIM functions are not required during wait mode, reduce power consumption by stopping the TIM before executing the WAIT instruction. Freescale Semiconductor, Inc. For More Information On This Product, Go to: www.freescale.com |
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