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MC68HC908GR4MP bảng dữ liệu(PDF) 59 Page - Freescale Semiconductor, Inc |
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MC68HC908GR4MP bảng dữ liệu(HTML) 59 Page - Freescale Semiconductor, Inc |
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59 / 408 page ![]() Low Power Modes Technical Data MC68HC908GR8 — Rev 4.0 59 Low Power Modes MOTOROLA • Low-voltage inhibit (LVI) reset — A power supply voltage below the LVItripf voltage resets the MCU and loads the program counter with the contents of locations $FFFE and $FFFF. • Break interrupt — A break interrupt loads the program counter with the contents of locations $FFFC and $FFFD. • Timebase module (TBM) interrupt — A TBM interrupt loads the program counter with the contents of locations $FFDC and $FFDD when the timebase counter has rolled over. This allows the TBM to generate a periodic wakeup from stop mode. Upon exit from stop mode, the system clocks begin running after an oscillator stabilization delay. A 12-bit stop recovery counter inhibits the system clocks for 4096 CGMXCLK cycles after the reset or external interrupt. The short stop recovery bit, SSREC, in the configuration register controls the oscillator stabilization delay during stop recovery. Setting SSREC reduces stop recovery time from 4096 CGMXCLK cycles to 32 CGMXCLK cycles. NOTE: Use the full stop recovery time (SSREC = 0) in applications that use an external crystal. Freescale Semiconductor, Inc. For More Information On This Product, Go to: www.freescale.com |
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