at89c51的介紹外文翻譯-其他專業(yè)-展示頁(yè)
2025-01-31 06:19本頁(yè)面
【正文】 esistor. Port 0 also receives the code bytes during Flash programming, and outputs the code bytes during Program verification. External Pullup resistors are required during Program verification. Port 1 Port 1 is an 8bit bidirectional I/O port with internal Pullup resistors. The Port 1 output buffers can sink/source four TTL inputs. When 1s are written to Port 1 pins they are pulled high by the internal Pullup resistors and can be used as inputs. As inputs, Port 1 pins that are externally being pulled low will source current (IIL) because of the internal Pullup resistors. Port 1 also receives the loworder address bytes during Flash programming and verification. Port 2 Port 2 is an 8bit bidirectional I/O port with internal Pullup resistor. The Port 2 output buffers can sink/source four TTL inputs. When 1s are written to Port 2 pins they are pulled high by the internal Pullup resistor and can be used as inputs. As inputs, Port 2 pins that are externally being pulled low will source current, because of the internal Pullup resistor. Port 2 emits the highorder address byte during fetches from external program memory and during accesses to external data memory that use 16bit addresses. In this application, it uses strong internal Pullup resistor when emitting 1s. During accesses to external data memory that use 8bit addresses, Port 2 emits the contents of the P2 Special Function Register. Port 2 also receives the highorder address bits and some control signals during Flash programming and verification. 2021屆電子信息科學(xué)與技術(shù)專業(yè)畢業(yè)設(shè)計(jì) 專業(yè)文獻(xiàn)翻譯 題 目 : AT89C51 的介紹 姓 名 : 學(xué) 院 : 專 業(yè) : 電子信息科學(xué)與技術(shù) 班 級(jí) : 班 學(xué) 號(hào) : 指 導(dǎo)教師 : 職稱 : 20 年 月 日 南京農(nóng)業(yè)大學(xué)教務(wù)處制 2021屆電子信息科學(xué)與技術(shù)專業(yè)畢業(yè)設(shè)計(jì)外文翻 譯 1 原文： The Introduction of AT89C51 Description The AT89C51 is a lowpower, highperformance CMOS 8bit microputer with 4K bytes of Flash programmable and erasable read only memory (PEROM). The device is manufactured using Atmel’s highdensity nonvolatile memory technology and is patible with the industrystandard MCS51 instruction set. The onchip Flash allows the program memory to be reprogrammed insystem or by a conventional nonvolatile memory programmer. By bining a versatile 8bit CPU with Flash on a monolithic chip, the Atmel AT89C51 i
畢業(yè)設(shè)計(jì)相關(guān)推薦
鄂ICP備17016276號(hào)-1