Warning: Use of undefined constant title - assumed 'title' (this will throw an Error in a future version of PHP) in /data/www.zhuangjiba.com/web/e/data/tmp/tempnews1.php on line 152 sd卡是什么意思
- 分类:硬件教程 发布时间: Warning: Use of undefined constant newstime - assumed 'newstime' (this will throw an Error in a future version of PHP) in /data/www.zhuangjiba.com/web/e/data/tmp/tempnews1.php on line 156 2024年10月23日 18:03:36
工具/原料:
系统版本:安卓系统
品牌型号:华为手机
方法/步骤:
一、sd卡是什么意思
SD卡的意思是一种基于半导体快闪记忆器的新一代记忆设备,即手机储存的扩展卡。SD卡的全称是Secure Digital Card,主要特点是数据传输速度快、体积小、可热插拔等,被广泛地用于便携式装置上。因为SD卡是闪存,所以是可以用来存放文件的,类似于U盘一样。
二、sd卡作用
sd卡最大的特点就是通过加密功能,可以保证数据资料的安全保密。它还具备版权保护技术,所采用的版权保护技术是DVD中使用的CPRM技术(可刻录介质内容保护)。SD卡具有体积小、容量大、抗震防潮、耐高温、性能稳定、永久有效保存数据、无噪音、无寻道错误特点。是现今流行的主流产品存储卡,SD卡接在标准的ATA IDE接口上,当标准的IDE存储设备,当然也可以储存软件安装程序。
三、sd卡的分类
① 根据外型尺寸,可以将sd卡划分为三种类型:SD卡、Mini SD卡、Micro SD卡(旧称TF卡)。
标准SD是规格最大的一种,今天市面上大多数消费级数字相机和摄像机均使用此标准的SD卡,这种卡有标准的“缺角”设计。
Mini SD卡,在性能上与标准SD卡并无太大区别,主要是尺寸更小。Mini SD卡特点是体积小巧、性能稳定,配合专用转接卡使用,可完全兼容标准SD卡插槽。而且Mini SD卡采用的是低耗电的设计,比标准SD卡更适用于移动通信设备,因此主要进攻手机、PDA、掌上电脑的信息终端。
Micro SD 卡,原名Trans-flash Card(TF卡),在2004年正式更名为Micro SD 卡,由闪迪(SanDisk)公司发明,主要应用在移动手机。
② 根据SD卡的容量,可划分为SD、SDHC(SD High Capacity)、SDXC(SD Extended Capacity)三种标准。现今,市场的主流SD产品是SDHC和SDXC这两种较大容量的存储卡,而SD卡因容量过小,已逐渐被市场淘汰。
四、sd卡的使用
sd卡应用于以下的手提数码装置:
1、数码相机储存相片及短片
2、数码摄录机储存相片及短片
3、个人数码助理(PDA)储存各类资.
4、手提电话储存相片、铃声、音乐、短片等资料
5、多媒体播放器
sd卡多用于MP3随身听、数码摄像机、数码相机等,也有用于笔记本电脑上。其投影面积与MMC卡相同,只是略微厚一点,为2.1mm,但是sd卡的容量大得多,且读写速度也MMC卡快4倍。同时,SD卡的接口与MMC卡是兼容的,支持SD卡的接口大多支持MMC卡。目前SD卡在数码相机中正在迅速普及,大有成为主流之势。SD卡在今年的发展很快,已经开始威胁到CF卡的市场分额了。这是由于SD卡的体积要比CF卡小很多,并且SD卡在容量、性能和价格上和CF卡的差距越来越小,而这两年支持SD卡的手机迅速在市场走热,因此,SD卡的迅速成长绝对不是偶然的。最重要的一点就是MMC卡也能和SD卡相兼容,这也正是sd卡迅速走红的原因之一。不过注意的是,在某些产品例如手机上,SD卡和MMS卡是不能兼容的。现在的SD卡容量由8MB到32GB不等。
总结:
以上就是对sd卡的详细介绍。看完以上的介绍,大家应该对sd卡有了全新的认识。
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