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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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MC68HC705P9CS 데이터시트(PDF) 44 Page - Freescale Semiconductor, Inc |
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MC68HC705P9CS 데이터시트(HTML) 44 Page - Freescale Semiconductor, Inc |
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44 / 160 page  Central Processor Unit (CPU) Technical Data MC68HC705P9 — Rev. 4.0 44 Central Processor Unit (CPU) MOTOROLA 4.2 Features Features include: • 2.1-MHz bus frequency • 8-bit accumulator • 8-bit index register • 13-bit program counter • 6-bit stack pointer • Condition code register with five status flags • 62 instructions • Eight addressing modes • Power-saving stop, wait, and data-retention modes 4.3 Introduction The central processor unit (CPU) consists of a CPU control unit, an arithmetic/logic unit (ALU), and five CPU registers. The CPU control unit fetches and decodes instructions. The ALU executes the instructions. The CPU registers contain data, addresses, and status bits that reflect the results of CPU operations. 4.4 CPU Control Unit The CPU control unit fetches and decodes instructions during program operation. The control unit selects the memory locations to read and write and coordinates the timing of all CPU operations. Freescale Semiconductor, Inc. For More Information On This Product, Go to: www.freescale.com |
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