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M68HC08 Datasheet(PDF) 83 Page - Freescale Semiconductor, Inc |
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M68HC08 Datasheet(HTML) 83 Page - Freescale Semiconductor, Inc |
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83 / 332 page  Central Processor Unit (CPU) MC68HC908JB16 — Rev. 1.1 Technical Data Freescale Semiconductor Central Processor Unit (CPU) 83 6.6.2 Stop Mode The STOP instruction: • Clears the interrupt mask (I bit) in the condition code register, enabling external interrupts. After exit from stop mode by external interrupt, the I bit remains clear. After exit by reset, the I bit is set. • Disables the CPU clock. After exiting stop mode, the CPU clock begins running after the oscillator stabilization delay. 6.7 CPU During Break Interrupts If the break module is enabled, a break interrupt causes the CPU to execute the software interrupt instruction (SWI) at the completion of the current CPU instruction. (See Section 19. Break Module (BRK).) The program counter vectors to $FFFC–$FFFD ($FEFC–$FEFD in monitor mode). A return-from-interrupt instruction (RTI) in the break routine ends the break interrupt and returns the MCU to normal operation if the break interrupt has been deasserted. 6.8 Instruction Set Summary Table 6-1 provides a summary of the M68HC08 instruction set. 6.9 Opcode Map The opcode map is provided in Table 6-2. |
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