【经验】32位MCU CKS32F103x8的实时时钟(RTC)精确校准方法
实时时钟在嵌入式系统中往往是必不可少的功能模块,比如水表、电表、手表、玩具等,而时钟的功能就是计时,其准确度,走时误差是重要的衡量指标。尽管硬件设计阶段会尽可能的保证RTC的时钟源的精确度,但是在生产环节,使用环节,往往还存在很多的不确定因素,比如温度的变化,这将导致RTC的误差增大,有时一月可能会差上几分钟甚至几十分钟,导致产品的时钟功能失去意义。
值得庆幸的是中科芯32位MCU CKS32F103x8的实时时钟(RTC)包含了一个非常特殊的功能,通过配置寄存器BKP_RTCCR的CAL[6:0]可以减慢RTC,该校准值表示在每 220个时钟脉冲内将有多少个时钟脉冲被跳过。这可以用来对RTC进行很精确的校准,以1000000/220ppm的比例减慢时钟, RTC时钟可以被减慢0~121ppm。
通过综合石英晶体振荡器的温度特性,在保证每月时钟误差的范围内,设置CAL的值进行不同温度阶段的时差调整比起调节匹配电容具有更大的灵活性和准确度。如下为某石英晶体振荡器的温度与精度曲线:
在CKS32F103x8中通过寄存器BKP_RTCCR的CAL进行RTC快慢调整可以从220个时钟脉冲中跳过0~127个时钟周期,其原理如下:
可以看出RTC的时钟源不再是LSE的32.768kHz石英晶体振荡器的频率,而是经过CAL[6:0]删减过的时钟,由于该功能只能减慢RTC,所以对于本来RTC就慢的是起不到作用的,所以应用此功能时需要在硬件上故意将RTC调快一些或者改变RTC的时钟分频值(比如将32768分频改为32766分频)。
官方也提供了非常方便的库函数操作,当确定了CAL[6:0]的值后可以通过如下调用进行更改:
void BKP_SetRTCCalibrationValue(u8 CalibrationValue);
通过该种方式,对于RTC走时误差在0~314秒/月的范围内均可精确调整。
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航顺芯片(HANGSHUN)32位MCU选型表
描述- 深圳市航顺芯片技术研发有限公司2013年成立,在成都、上海设立分公司和办事处,致力以“车规SoC+高端MCU超市双战略、让万物互联更智慧,智慧生活更美好”为使命,实现“HK32MCU为核心、打造航顺无边界生态平台级企业”的伟大愿景。
型号- HK32T040K6U6,HK32M053E4P7,HK32ASAFE010RBT6,HK32F072家族,HK32F030ME6U7A,HK32F39ARET6A,HK32M050F4P7,HK32F0301ME6P7A,HK32F04AKBT6A,HK32F04AC6T6A,HK32F0301ME4U7A,HK32F0301MF6N7A,HK32F0301MJ6M7A,HK32ASAFE010GBU6,HK32F103RET6A,HK32E032R4T5,HK32F031C4T6,HK32AUTO39A,HK32F103RET6,HK32F030MF4P7A,HK32ASPIN023C8U7,HK32F072,HK32L088FBP6,HK32F0301MJ4M6,HK32AUTO39A-0MF4P6,HK32F030M,HK32F04AK8U6A,HK32F04AGBU6A,HK32R783K8U7,HK32ASAFE3009RDT7,HK32L0H4CBT6,HK32C003F4P6,HK32C005K8T7,HK32L084FBP6,HK32ASPIN021K8T7,HK32F103VCT6,HK32F072CBU6,HK32U3009VCT7,HK32F40X家族,HK32F103VET6A,HK32F030MF4U6,HK32F030C6T6A,HK32G003F4P7,HK32F04AF8P6A,HK32F031G4U6A,HK32M054G4P7,HK32F0301MD4P7C,HK32W0家族,HK32F0301MD4P7A,HK32F04ARBT6A,HK32F031K4T6A,HK32L088KBT6,HK32F0301M家族,HK32ASAFE3009家族,HK32M050E4U7,HK32F04AK8U6,HK32F04AFBP6A,HK32F407ZET6,HK32AUTO39A家族,HK32F031C4T6A,HK32F0301MF6U7A,HK32C030K8U7,HK32F0301MD4P6,HK32F072CBT6,HK32C207K8T7,HK32F40X,HK32F04AF6P6,HK32T040E6Y6,HK32F031F6P6,HK32ASAFE010,HK32F407VGT6,HK32F39AVET6A,HK32U3009RET7,HK32F0301MG4P7A,HK32F103VDT6,HK32F072R8T6,HK32L0H4GBU6,HK32ASPIN010RBT6,HK32F030M家族,HK32ASPIN010GBU6,HK32F030C8T6,HK32L0H4RBT6,HK32ASAFE3009RCT7,HK32F04AK8T6A,HK32L0家族,HK32M050G4P7,HK32ALG31,HK32F030MG4U7A,HK32G003F4N7,HK32T010S8T7,HK32U3009VDT7,HK32F030MG6P7A,HK32F04AK8T6,HK32F04AC4T6,HK32F39ARCT6,HK32C003F4N6,HK32F103RDT6A,HK32AUTO39A-3ARET7,HK32T010C8T7,HK32L084KBT6,HK32ALG31E8U6,HK32F103C8T6,HK32F031K4U6A,HK32F103C8T6A,HK32,HK32L084CBT6,HK32F39A,HK32F030MF4P6,HK32ASAFE010KBU6,HK32F04AR8T6A,HK32F030ME4P7A,HK32F103VDT6A,HK32F030R8T6A,HK32L0,HK32F031C6T6,HK32F103RCT6,HK32T040F6P6,HK32L0H8FBP6,HK32F030,HK32X003,HK32F031,HK32F030MJ4M7A,HK32F030MF4N7A,HK32F04ACBT6A,HK32F04AK6T6A,HK32F39A家族,HK32F103C8T7B,HK32M050F4U7,HK32C030K8T7,HK32ASPIN020S8T7,K32ASPIN022K8T7,HK32W030KEU6,HK32F031F6P6A,HK32F04AF4P6A,HK32U3009VET7,HK32C105S8T7,HK32ASAFE010KBT6,HK32M065C8U7,HK32ASAFE010家族,HK32G003F4U7,HK32F031G4U6,HK32L088CBT6,HK32F031K6U6A,HK32SPIN0232C8T7,HK32F04AK6U6,HK32F04AC8T6A,HK32F030MF4N6,HK32F0301MF4P7C,HK32M064C8U7,HK32F0301ME6U7A,HK32F04AR8T6,HK32F0301MF4P7A,HK32F04AF4P6,HK32M053G4P7,HK32F407VET6,HK32ASPIN020E8P7,HK32F04AG8U6,HK32F072C8U6,HK32F103CCT7B,HK32M060C8T7,HK32F103RDT6,HK32F030MF4U7A,HK32F030K6T6A,HK32F04AG8U6A,HK32F030MF6P7A,HK32F04AKBU6A,HK32L0H4KBU6,HK32ASPIN010KBU6,HK32F030C6T6,HK32F04AK6T6,HK32L0H8KBT6,HK32T040K6T6,HK32X003家族,HK32F04A,HK32AUTO39A-3AVET7,HK32F0301MF4U6,HK32C003D4P6,HK32F072C8T6,HK32M060C8U7,HK32ASAFE010FBP6,HK32W020KEU6,HK32F030MD4P7A,HK32C030F8P7,HK32R783S8T7,HK32F031G6U6A,HK32ASPIN010KBT6,HK32F030家族,HK32L0H8KBU6,HK32F031C6T6A,HK32F031K4T6,HK32F0301MF4P6,HK32F103V8T6A,HK32C003J4M6,HK32G003J4M7,HK32F103RBT7B,HK32F0301MG4U7A,HK32ASPIN021C8T7,HK32F39AVCT6A,HK32T0家族,HK32F030K6T6,HK32L084RBT6,HK32L084GBU6,HK32F0301MG6P7A,HK32M050G4U7,HK32F103,HK32F39AVDT6,HK32F031K4U6,HK32ASPIN家族,HK32F030MG6U7A,HK32F103RBT6A,HK32F04A家族,HK32ALG31G8U6,HK32F030R8T6,HK32F031G6U6,HK32L0H4KBT6,HK32F031家族,HK32F030ME4U7A,HK32L0H4FBP6,HK32M063K8U7,HK32F030MD4P6,HK32F04AK4U6,HK32F0301ME4P7A,HK32F04AC4T6A,HK32ASPIN010FBP6,HK32F39ARCT6A,HK32F103VCT7B,HK32F0301MF4N7C,HK32F030ME6P7A,HK32F0301MF4N7A,HK32F04AG6U6,HK32F103CBT6A,HK32F030F4P6A,HK32C207S8T7,HK32F103RBT6,HK32F04AG4U6A,HK32CXXX,HK32F030MF6N7A,HK32F04AK6U6A,HK32L088RBT6,HK32C030C8T7,HK32ASAFE3009VET7,HK32F04AK4T6,HK32L088GBU6,HK32E032,HK32T010K8T7,HK32C105K8U7,HK32F103VCT6A,HK32T0,HK32F030C8T6A,HK32F103CBT7B,HK32F39AVET6,HK32F0301MD6P7A,HK32F04AC8T6,HK32R78,HK32R78家族,HK32F031K6T6A,HK32U3009家族,HK32F0301MF4U7C,HK32F0301MF4U7A,HK32ASPIN,HK32SPIN0732C8T7,HK32C003F4U6,HK32F031K6T6,HK32C105K8T7,HK32F0301MF6P7A,HK32ASAFE010CBT6,HK32T040G6U6,HK32U3009RDT7,HK32F0301M,HK32L084KBU6,HK32AUTO39A-3ACET7,HK32F04AG6U6A,HK32F030MJ4M6,HK32F030MF6U7A,HK32F103VET6,HK32ASAFE3009VDT7,HK32F04AK4U6A,HK32L0H8RBT6,HK32L0H8GBU6,HK32F030MG4P7A,HK32M055G4P7,HK32F103R8T7B,HK32F103家族,HK32F031K6U6,HK32M050E4P7,HK32W030CEU6,HK32CXXX家族,HK32E032家族,HK32F103RCT7B,HK32F39ARDT6,HK32ASPIN020K8T7,HK32F031F4P6,HK32F39AVDT6A,HK32AUTO39A-3BRBT7,HK32U3009,HK32ALG31K8U6,HK32F407ZGT6,HK32AUTO39A-03C8T7,HK32F030F4P6,HK32C030G8U7,HK32F04AG4U6,HK32F030MD6P7A,HK32F103R8T6A,HK32F0301MF4N6,HK32M060K8T7,HK32F103VBT6A,HK32AUTO39A-03R8T7,HK32F103RCT6A,HK32F0301MJ4M7C,HK32F072RBT6,HK32W0,HK32F0301MJ4M7A,HK32ASAFE3009RET7,HK32U3009RCT7,HK32F030MJ6M7A,HK32F04AF8P6,HK32F0301MG6U7A,HK32T010G8U7,HK32ASAFE3009VCT7,HK32F04AK4T6A,HK32L088KBU6,HK32F39AVCT6,HK32F103CBT6,HK32ASPIN022C8T7,HK32M060K8U7,HK32R782F8P7,HK32F39ARDT6A,HK32F39ARET6,HK32ASAFE3009,HK32F031F4P6A,HK32F04AC6T6,HK32F04AF6P6A,HK32T040C6T6,HK32AUTO39A-3ARCT7,HK32G003D4P7,HK32F103R8T6,HK32ALG31家族,HK32ASPIN010CBT6,HK32L0H8CBT6,HK32R783K8T7
【应用】国产32位MCU CKS32F031K6T6用于电子烟,输入电压范围2.0~3.6V,频率最高可达48MHz
在电子烟的应用中,推荐使用中科芯32位MCU CKS32F031K6T6作为主控控制单元,实现多元化的控制管理功能,通过锂电池给MCU进行供电,拥有从16K到32K字节的闪存储存器,4K字节的SRAM带硬件校验,低功耗休眠,停止和待机模式。
应用方案 发布时间 : 2023-05-09
华芯微特(Synwit)32位MCU选型指南
目录- 公司介绍&产品分类 TFT-LCD 显示和人机界面(HMI)用微控制器 电机专用微控制器 大家电 & 工控通用微控制器 32位微控制器选型表
型号- SWM34X,SWM320 SERIES,SWM 201C6T7-50,SWM19SCBT6-50,SWM190 SERIES,SWM 201 系列,SWM32SRET6,SWM181CCT6-50,SWM260KBT7-80,SWM190KBT6-80,SWM201G6S7-65,SWM 201,SWM 201G6S7-65,SWM 19S 系列,SWM201,SWM260 SERIES,SWM320,SWM19S,SWM160,SWM20PG6S6,SWM20D,SWM32SRET6-50,SWM 20PG6S6-65,SWM 190,SWM181CBT6-50,SWM260CBT7-50,SWM260PBT7-80,SWM 260 系列,SWM32S,SWM181 SERIES,SWM181RCT6-50,SWM20P,SWM260CBT7,SWM160C8T7-50,SWM190CBT6-50,SWM20G,SWM 190 系列,SWM 260,SWM 181,SWM201 SERIES,SWM320RET7-50,SWM181DBU6-40,SWM181CBT6,SWM160 SERIES,SWM 341,SWM 341 系列,SWM190 系列,SWM201C6T7-50,SWM 181 系列,SWM320VET7-50,SWM341,SWM190RBT6-50,SWM20PG6S6-65,SWM260,SWM181,SWM320CET7-50,SWM190
【产品】中科芯包含3个12位ADC的32位MCU系列,工作温度为-40~+105℃,适用于电机驱动和应用控制
本文给出了中科芯CKS32F405/CKS32F407/CKS32F415/CKS32F417高性能型MCU产品的器件特性。CKS32F405/CKS32F407/CKS32F415/CKS32F417 MCU系列使用高性能的32位的内核,工作频率为168MHz。32位内核包含浮点运算单元(FPU),同时还支持DSP指令以及存储保护(MPU)用来加强应用的安全性。
产品 发布时间 : 2023-04-21
中科芯32位MCU CKS32更低功耗PIN-PIN替代STM32,免费样品支持,2-4周供货,解决疫情环境缺货问题
随着新冠疫情在海外地区国家的蔓延,各地政府也都不得不升级了应对措施,工厂及生产企业停工停产,阻断疫情的传播。据路透社报道显示,意法半导体(STMicro electronics)已经同意将法国工厂减产50%。随着法国晶圆厂的部分停产,其32位MCU的产能受到很大的冲击,导致STM32系列主流型号缺货涨价,如何在不改变软硬件的前提下缓解ST MCU的供货冲击呢?中科芯是个不错的选择。
原厂动态 发布时间 : 2020-04-08
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可定制显示屏的尺寸0.96”~15.6”,分辨率80*160~3840*2160,TN/IPS视角,支持RGB、MCU、SPI、MIPI、LVDS、HDMI接口,配套定制玻璃、背光、FPCA/PCBA。
最小起订量: 1000 提交需求>
可烧录IC封装SOP/MSOP/SSOP/TSOP/TSSOP/PLCC/QFP/QFN/MLP/MLF/BGA/CSP/SOT/DFN;IC包装Tray/Tube/Tape;IC厂商不限,交期1-3天。支持IC测试(FT/SLT),管装、托盘装、卷带装包装转换,IC打印标记加工。
最小起订量: 1pcs 提交需求>
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