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SPMCK16Z4MPV16 Datasheet(PDF) 95 Page - Freescale Semiconductor, Inc |
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SPMCK16Z4MPV16 Datasheet(HTML) 95 Page - Freescale Semiconductor, Inc |
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95 / 500 page ![]() M68HC16 Z SERIES CENTRAL PROCESSING UNIT USER’S MANUAL 4-35 Figure 4-5 Instruction Execution Model 4.10.1 Microsequencer The microsequencer controls the order in which instructions are fetched, advanced through the pipeline, and executed. It increments the program counter and generates multiplexed external tracking signals IPIPE0 and IPIPE1 from internal signals that con- trol execution sequence. 4.10.2 Instruction Pipeline The pipeline is a three stage FIFO that holds instructions while they are decoded and executed. Depending upon instruction size, as many as three instructions can be in the pipeline at one time (single-word instructions, one held in stage C, one being exe- cuted in stage B, and one latched in stage A). 4.10.3 Execution Unit The execution unit evaluates opcodes, interfaces with the microsequencer to advance instructions through the pipeline, and performs instruction operations. A B C MICROSEQUENCER EXECUTION UNIT DATA BUS INSTRUCTION PIPELINE IPIPE0 IPIPE1 16 EXEC UNIT MODEL Freescale Semiconductor, Inc. For More Information On This Product, Go to: www.freescale.com |
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