是digital input/output的缩写，是指数字量输入输出端口。
名词解释
单片机
单片机，全称单片微型计算机（英语：Single-Chip Microcomputer），又称微控制器（Microcontroller），是把中央处理器、存储器、定时/计数器（Timer/Counter）、各种输入输出接口等都集成在一块集成电路芯片上的微型计算机。与应用在个人电脑中的通用型微处理器相比，它更强调自供应（不用外接硬件）和节约成本。它的最大优点是体积小，可放在仪表内部，但存储量小，输入输出接口简单，功能较低。由于其发展非常迅速，旧的单片机的定义已不能满足，所以在很多应用场合被称为范围更广的微控制器；由于单芯片微电脑常用于当控制器故又名single chip microcontroller，但是目前在中国大陆仍多沿用“单片机”的称呼。
主要特点
1、主流单片机包括CPU、4KB容量的ROM、128 B容量的RAM、 2个16位定时/计数器、4个8位并行口、全双工串口行口、ADC/DAC、SPI、I2C、ISP、IAP。
2、系统结构简单，使用方便，实现模块化；
3、单片机可靠性高，可工作到10^6 ~10^7小时无故障；
4、处理功能强，速度快。
5、低电压，低功耗，便于生产便携式产品
6、控制功能强
7、环境适应能力强。
本田DIO是本田公司研发的一款小型踏板车型。DIO是西班牙语“上帝之爱”的意思，它是本田一个比较有名的小排量踏板车系，目前国内合资的新大洲本田生产125CC的Dio，有化油器和电喷两种。
作为1988年本田在日本推出的一款经典小型踏板车型。DIO一个畅销日本和北欧美。2002年6月，DIO出口版（50CC）正式在新大洲本田投产，专供国外市场，迄今以累计出口88万辆，销往十个国家和地区。此次上市的DIO内销版（125CC），是承袭本田DIO经典设计，面向中国消费者研发的全新车型。
2001年6月，DIO出口版（50CC）正式在新大洲本田投产，专供国外市场，迄今以累计出口88万辆，销往十个国家和地区。此次上市的DIO内销版（90CC），是承袭本田DIO经典设计，面向中国消费者研发的全新车型。
开发理念： “时尚外观，舒适驾驶，是DIO的核心开发理念。”在外观上，DIO兼具了时髦风格与易操作的紧凑感；舒适性方面，充分照顾女性用户的便利与顺畅驾控。搭载全新设计125cc发动机，DIO实现了高经济性和高环保性的和谐统一。
全球领先的超凡动力
环保省油，首次采用对应燃油蒸发技术，达标国Ⅲ排放标准，经济车速仅为二升/百公里
超强动力
本田最新一代引擎，优良的动力性能，高速时，动力更为强劲。启用柔和的加速设计，女性用户驾驶起来感觉更安全更顺畅。
超级静音
新型变速机构CVT，配合本田最新发动机，降噪技术，与消音器静音处理，带来无以伦比的宁静驾驶感受
缤纷悦目潮流外观
丰富颜色，多达七款时尚色彩，丰富选择，更能表达独特个性豪华前大灯月牙型造型，水晶化设计，散发高贵典雅气息，尊贵后尾灯，轿车级豪华尾灯，晶莹透亮，气质尊贵，明亮发光，夜间行车更安全，
周全贴心的安全保障
超大前轮和碟刹盘，十二寸加大前轮配以直径190mm大碟刹盘，令操作稳定性大位提升，直筒式减震器，令制动平稳，减小俯冲现象，大大提升行车的安全感受，
多功能电磁防盗锁
采用磁性开关锁盖功能，即可防止外力恶性破损，又减少互开率，防盗性比普通锁提高近24倍。给爱车更多安全保障。
安全手刹保护装置
汽车级原理，在不熄火停车或上坡停车时手刹制动保障安全。
轻松自如地舒适驾驭
极佳脚着地性，优化设计地坐垫高度和宽度，即使身高1.56M的女性用户骑乘脚步也能轻松平稳地着地，舒适又安全。
宽敞地脚安放性
更宽敞地脚放空间，骑乘时更能体验驾驶享受，
便利通行与停放。前后轴距和宽度的改善令整车更为紧凑，能够自如穿行或停入于狭窄区域。
轻松支车
整车受力点及主撑的优化设计只需要轻省用力既可支车，尤其便用女性用户驻车
舒适鞍座
采用最新发泡材料技术，改善鞍座的厚度和软硬度，令乘坐倍感舒适，长时间骑车也不易疲劳，
The Honda Dio was introduced in Japan in January 1988. The name is derived from the son of Venus"dyonisiac" [clarify].this model is for lifeline (4742) - ish-jais. It is now manufactured and assembled in India by Honda's HMSI subsidiary, from where it is exported to UK as the Honda Lead. The Dio is equipped with cushioned seats and an under-seat storage box upto 18 litres.
The Japanese Dio was equipped with the two-stroke 50 cc (3.1 cu in) AF18E single-cylinder engine with electric start. It is superficially similar to the USA-only Honda "Elite S".
Later versions in some markets were equipped with a 102 cc (6.2 cu in) air-cooled, four-stroke, single-cylinder, OHC engine with both electric self-start and kick start. This model was not exported to the USA.
The Indian version has a 6-litre (1.3 imp gal; 1.6 US gal) fuel tank, of which one litre is reserve, and the Japanese version has a 4-litre (0.88 imp gal; 1.1 US gal) fuel tank with no reserve.
In 2012, HMSI launched a new Dio at Auto Expo in India. It has a new 110 cc (6.7 cu in) engine, which also runs Honda's Activa and Aviator. It also has a new look and new headlight.
The 2013 HMSI Dio had claimed improvements in fuel efficiency and combined brakes.
Radio Dio is an independent radio station, broadcasting to the French city of Saint-Étienne and its outskirts.Its slogan is "Free, Wild, and Impertinent". Its mission is to speak to 'have-nots' and to promote the local, national and international independent scene. In spite of its emphasis on rock'n'roll, Radio Dio broadcasts a great diversity of current musical styles, including reggae, electro, and some blues and metal. Its logo is a cat because in Radio Dio, the cat ate the rat.[clarification needed]
Dio broadcasts on the Internet and on FM frequency 89.5Mhz, in Saint-Etienne and its near surroundings. Having previously been a pirate station, Radio Dio was officially created in 1981, as part of the liberalization of the FM band. The station has three paid employees. It takes part in the diffusion and the discovery of talents, and particularly buildings.[clarification needed]
It remains one of the few French radios not to broadcast adverts.[citation needed] Radio Dio is a founding member of the Ferarock national collective (of which it has always formed a part); a member of the Office and the commission d'Ecoute. It is also member of the collective d'associations ligériennes, the Slug, which manages the SMAC, Salle of the Current music of St Etienne, the Wire, which was inaugurated at the end of January 2008.