SPMCK16Z4MPV16 datasheet(95/500 Pages) FREESCALE

tên linh kiện	SPMCK16Z4MPV16

Giải thích chi tiết về linh kiện	M68HC16Z Series

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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.

MICROSEQUENCER

EXECUTION UNIT

DATA

BUS

INSTRUCTION PIPELINE

IPIPE0

IPIPE1

16 EXEC UNIT MODEL

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