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68HC705SB7 Datasheet(PDF) 46 Page - Freescale Semiconductor, Inc |
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68HC705SB7 Datasheet(HTML) 46 Page - Freescale Semiconductor, Inc |
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46 / 170 page  GENERAL RELEASE SPECIFICATION August 27, 1998 MOTOROLA LOW POWER MODES MC68HC05SB7 6-2 REV 2.1 Figure 6-1. STOP and WAIT Flowchart STOP CLEAR I BIT IN CCR. SET IRQE BIT IN ISCR. CLEAR CTOF, RTIF, CTOFE, AND RTIE BITS IN TSCR. DISABLE OSCILLATOR EXTERNAL RESET? EXTERNAL INTERRUPT? NO NO TURN ON OSCILLATOR. RESET STABILIZATION DELAY TIMER. YES YES END OF STABILIZATION DELAY? YES NO WAIT TURN ON CPU 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. CLEAR ICF, OCF AND TOF BITS IN TSR. CLEAR ICIE, OCIE and TOIE BITS IN TCR. CLEAR I BIT IN CCR. SET IRQE BIT IN ISCR. TURN OFF CPU CLOCK. KEEP OTHER MODULE CLOCKS ACTIVE. NO EXTERNAL RESET? YES NO INTERRUPT? YES CDET NO EXTERNAL INTERRUPT? YES NO PROG. INTERRUPT? YES TIMER NO SM-BUS INTERRUPT? YES NO YES NO COP RESET? YES INTERRUPT? ANALOG CORE INTERRUPT? TIMER YES NO |
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