开心快3

单片机控制板的设计原则

开心快3RIQI:2018-05-26 / RENQI: / LAIYUAN:eecqu.com

1. 元器件布局的考虑

元器件布局时,应该把相互有关的元件尽量放得近一些。例如,时钟发生器、晶振、CPU的时钟输入端都易产生噪音,在放置的时候应该把它们靠近些。对于那些易产生噪声的器件、小电流电路、大电流电路、开关电路等,应尽量使其远离单片机的逻辑控制电路和存储电路(ROM、RAM);如有可能,则将这些电路另外制成电路板,会更加有利于抗干扰,提高电路工作时的可靠性。

2. 去耦电容的设置

开心快3 JINLIANGZAIGUANJIANYUANJIAN,RUROM、RAMDENGXINPIANPANGBIANANZHUANGQUOUDIANRONG。SHIJISHANG,YINZHIDIANLUBANZOUXIAN、YINJIAOZOUXIANHEJIEXIANDENGDOUKENENGHANYOUJIAODADEDIANGANXIAOYING。DADEDIANGANKENENGZAIVCCZOUXIANSHANGYINQIYANZHONGDEKAIGUANZAOSHENGJIANFENG,FANGZHIQICHANSHENGDEWEIYIFANGFASHIZAIVCCYUDIANYUANDIZHIJIANANFANGYIGE0.1μFDEQUOUDIANRONG。RUGUODIANLUBANSHANGSHIYONGDESHIBIAOMIANANZHUANGLINGJIAN,ZEKEYIYONGPIANZHUANGDIANRONGZHIJIEJINKAOZHEYUANJIAN,ZAIVCCYINJIAOSHANGGUDING。ZUIHAOSHISHIYONGCIPIANDIANRONG,YINWEIZHEIZHONGDIANRONGYOUJIAODIDEJINGDIANSUNHAO(ESL)HEGAOPINZUKANG,LINGWAIZHEIZHONGDIANRONGZAIWENDUHESHIJIANSHANGDEJIEZHIWENDINGXINGYEHENBUCUO。JINLIANGBUYAOSHIYONGTANDIANRONG,YINWEITAZAIGAOPINXIADEZUKANGJIAOGAO。

LINGWAIZAIANFANGQUOUDIANRONGSHIXUYAOZHUYIYIXIAJIDIAN:

开心快3 a. ZAIYINZHIDIANLUBANDEDIANYUANSHURUDUANKUAJIE100μFZUOYOUDEQUOUDIANRONG;RUGUOTIJIYUNXU,DIANRONGLIANGDAYIXIEGENGHAO。

开心快3 b. YUANZESHANGMEIGEJICHENGDIANLUXINPIANDEPANGBIANDOUXUYAOFANGZHIYIGE0.01μFDECIPIANDIANRONG;RUGUODIANLUBANDEKONGXITAIXIAOERFANGZHIBUXIA,KEYIMEI10GEXINPIANZUOYOUFANGZHIYIGE1~10μFDETANDIANRONG。

开心快3 c.  DUIYUKANGGANRAONENGLIRUODE、GUANDUANSHIDIANLIUBIANHUADADEYUANJIANHERAM、ROMDENGCUNCHUYUANJIAN,YINGGAIZAIDIANYUANXIAN(VCC)HEDIXIANZHIJIANJIERUQUOUDIANRONG。

d. DIANRONGDEYINXIANBUYAOTAIZHANG,TEBIESHIGAOPINPANGLUDIANRONGBUNENGDAIYINXIAN。

3. 接地线的处理

开心快3 ZAIZHEIZHONGDIANLUZHONGDIXIANDEZHONGLEIYOUHENDUO(YOUXITONGDI、PINGBIDI、LUOJIDI、MONIDIDENG),DIXIANBUJUSHIFOUHELI,JIANGJUEDINGZHENGGEDIANLUDEKANGGANRAONENGLI。ZAISHEJIDIXIANHEJIEDIDIANDESHIHOU,YINGGAIKAOLVYIXIAWENTI:

a. LUOJIDIHEMONIDIYAOFENKAIBUXIAN,BUNENGHEYONG,JIANGTAMENGECHUDEDIXIANFENBIEYUXIANGYINGDEDIANYUANDIXIANXIANGLIAN。SHEJISHI,MONIDIXIANYINGJINLIANGJIACU,ERQIEJINKENENGJIADAYINCHUDUANDEJIEDIMIANJI。YIBANLAIJIANG,DUIYUSHURUSHUCHUDEMONIXINHAO,YUDANPIANJIDIANLUZHIJIANZUIHAOTONGGUOGUANGOUJINXINGGELI。

开心快3 b. ZAISHEJILUOJIDIANLUDEYINZHIBANSHI,QIDIXIANYINGGOUCHENGBIHUANXINGSHI,KETIGAODIANLUDEKANGGANRAONENGLI。

c. DIXIANYINGJINLIANGCU。RUGUODIXIANHENXI,ZEDIXIANDIANZUJIANGHUIHENDA,ZAOCHENGJIEDIDIANWEISUIDIANLIUDEBIANHUAERBIANHUA,ZHISHIXINHAODIANPINGBUWEN、DIANLUDEKANGGANRAONENGLIXIAJIANG。ZAIBUXIANYUNXUDEQINGKUANGXIA,YAOBAOZHENGZHUYAODIXIANDEKUANDUZHISHAOZAI2~3mm,YUANJIANYINJIAOSHANGDEJIEDIXIANYINGZAI1.5mmZUOYOU。

d. YAOZHUYIJIEDIDIANDEXUANZE。DANGBANSHANGXINHAOPINLVDIYU1MHzSHI,YOUYUBUXIANHEYUANJIANZHIJIANDEDIANCIGANYINGYINGXIANGHENXIAO,ERJIEDIDIANLUXINGCHENGDEHUANLIUDUIYUGANRAODEYINGXIANGJIAODA,SUOYIYAOCAIYONGYIDIANJIEDI,SHIQIBUXINGCHENGHUILU。DANGDIANLUBANSHANGXINHAOPINLVGAOYU10MHzSHI,YOUYUBUXIANDEDIANGANXIAOYINGMINGXIAN,DIXIANZUKANGBIANDEHENDA,CISHIJIEDIDIANLUXINGCHENGDEHUANLIUJIUBUZAISHIZHUYAOWENTILE,SUOYIYINGCAIYONGDUODIANJIEDI,JINLIANGJIANGDIDIXIANZUKANG。

开心快3 e. DIANYUANXIANDESHEZHICHULEYAOGENJUDIANLIUDEDAXIAOJINLIANGJIACUXIANKUANDUWAI,BUXIANSHIHAIYINGSHIDIANYUANXIAN、DIXIANDEZOUXIANFANGXIANGYUSHUJUXIANDEZOUXIANFANGXIANGYIZHI。CIWAI,HAIKEYONGDIXIANJIANGDIANLUBANDEDICENGMEIYOUZOUXIANDEDIFANGPUMAN,ZHEIXIEFANGFADOUYOUZHUYUZENGQIANGDIANLUDEKANGGANRAONENGLI。

4. 数据线宽度选择

SHUJUXIANDEKUANDUYEYINGJINKENENGKUAN,YIJIANXIAOZUKANG。ZHISHAOBUXIAOYU0.3mm,RUGUOCAIYONG0.46mmHUOZHEGENGDA,ZEGENGWEILIXIANG。

5. 电路板过孔的处理

YOUYUDIANLUBANDEGUOKONGHUIDAILAIYUE10pFDEDIANRONGXIAOYING,DUIYUGAOPINDIANLU,JIANGHUIYINRUTAIDUODEGANRAO,SUOYIZAIBUXIANDESHIHOUYINGGAIZHUYI。

【格亚信电子】是专业从事电子产品设计、电子方案开发、电子产品PCBA加工的深圳电子方案公司,主要设计电子产品包括工控、汽车、电源、通信、安防、医疗电子产品开发。

开心快3GONGSIHEXINYEWUSHITIGONGYIGONGKONGDIANZI、QICHEDIANZI、YILIAODIANZI、ANFANGDIANZI、XIAOFEIDIANZI、TONGXUNDIANZI、DIANYUANDIANZIDENGDUOLINGYUDEDIANZICHANPINSHEJI、FANGANKAIFAJIJIAGONGSHENGCHANDEYIZHANSHIPCBAFUWU,WEIMANZUBUTONGKEHUXUQIUKETIGONGZHONGXIAOPILIANGPCBAJIAGONG。

开心快3GONGSICHANPINHANGAIGONGYESHENGCHANSHEBEIKONGZHISHEBEIDIANZIKAIFA、QICHEMCUDIANZIKONGZHIXITONGFANGANSHEJI、SIFUKONGZHIBANPCBAJIAGONG、SHUKONGJICHUANGZHUBANPCBAJIAGONG,ZHINENGJIAJUDIANZIYANFA、3DDAYINJIKONGZHIBANPCBAJIAGONGDENGLINGYU。YEWULIUCHENGBAOKUODIANZIFANGANKAIFASHEJI、PCBSHENGCHAN、YUANQIJIANCAIGOU、SMTTIEPIANJIAGONG、YANGJIZHIZUODIAOSHI、PCBAZHONGXIAOPILIANGJIAGONGSHENGCHAN、HOUQIZHIBAOWEIHUYIZHANSHIPCBAJIAGONGFUWU。

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作者:控制板


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