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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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68HC705JB4 데이터시트(PDF) 44 Page - Freescale Semiconductor, Inc |
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68HC705JB4 데이터시트(HTML) 44 Page - Freescale Semiconductor, Inc |
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44 / 134 page  GENERAL RELEASE SPECIFICATION February 24, 1999 MOTOROLA LOW POWER MODES MC68HC05JB4 6-2 REV 2 Figure 6-1. STOP and WAIT Flowchart STOP EXTERNAL RESET? EXTERNAL INTERRUPT? NO NO START STABILIZATION DELAY YES YES END OF STABILIZATION DELAY? YES NO WAIT RESTART INTERNAL PROCESSOR CLOCK 1. LOAD PC WITH RESET VECTOR OR 2. SERVICE INTERRUPT. a. SAVE CPU REGISTERS ON STACK. b. SET I BIT IN CCR. c. LOAD PC WITH INTERRUPT VECTOR. NO EXTERNAL RESET? YES NO YES NO EXTERNAL INTERRUPT? YES NO USB INTERRUPT? YES RESET OR NO YES IRQ2 INTERRUPT? EXTERNAL YES NO STOP EXTERNAL OSCILLATOR, STOP INTERNAL TIMER CLOCK, RESET START-UP DELAY STOP INTERNAL PROCESSOR CLOCK, CLEAR I-BIT IN CCR, SET IRQE IN ICSR EXTERNAL INTERRUPT? USB INTERRUPT NO NO YES YES IRQ IRQ2 OR RESET? RESTART EXTERNAL OSCILLATOR, IRQ TIMER1 INTERRUPT? INTERNAL MFT INTERRUPT? INTERNAL EXTERNAL OSCILLATOR ACTIVE, INTERNAL TIMER CLOCK ACTIVE STOP INTERNAL PROCESSOR CLOCK, CLEAR I-BIT IN CCR, SET IRQE IN ICSR Freescale Semiconductor, Inc. For More Information On This Product, Go to: www.freescale.com |
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