【应用】雅特力32位MCU AT32F421G8U7适用于VBAT设计供电,最高可支持64KB闪存存储器
雅特力科技推出AT32F421系列超值型ARM® Cortex®-M4微控制器MCU,高达120MHz的CPU运算速度与内建数字信号处理器(DSP),最高可支持64KB闪存存储器(Flash)及16KB随机存取存储器(SRAM),集成了丰富外设接口,同时还扩展了1个高速轨到轨输入/输出模拟电压比较器,采样率高达2M SPS的12位高速ADC,可充分满足高速数据采集、混合信号处理和工业控制与电机应用要求。具有多种可选功能还支持端口重映射,极佳的灵活性和易用性满足多种应用需求。
由于AT32F421芯片没有独立的VBAT供电引脚,如果需要使用类似VBAT供电实现待机功能,需要设计外部的电源切换电路。本文将介绍如何设计外部的电源切换电路与VBAT供电实现待机功能,设计可参考原理图如下图。
图1,电源与VBAT供电切换电路
解决外部供电电源切换电路与VBAT供电实现待机功能设计原理过程如下:
1、当 VDD 和 VBAT 同时有电时,VDD 电压比 VBAT 电压高,D2 导通,D1 关断,VDD 为 MCU 供电。当 VDD 断电时 D1 导通,VBAT 给 MCU 供电,D2 防止 VBAT 漏电到 VDD。注意: VDD 电压必须高于 VBAT,否则 VBAT 将优先 VDD 供电,电池的使用寿命会缩短。D1/D2 选用低压降二极管,尽量减小 VDD MCU 和 VDD 电压差。
2、PA0 用于检测 VDD 是否掉电,掉电后 PA0 将输入低电平,MCU 检测 PA0 状态后可进入低功耗模式以节省 VBAT 电池耗电,VDD 恢复供电时可通过 PA0 WKUP 唤醒 MCU,这些操作需要通过软件实现。VDD 掉电后 R1 将 PA0 电平拉至稳定的低电平,也可用 PA0 内部下拉电阻替代。
综上所述,外部供电切换电路与VBAT供电实现待机功能设计方案成功应用,延长电池的使用寿命,节省电池耗电的优秀解决方案。
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型号- EFM8UB20F32G,EFM8UB20F64G,EFM8,EFM8SB20F64G,SLSTK2000A,SLSTK2022A,SLSTK2010A,SLSTK2020A,SLSTK2030A,EFM8UB10F8G,EFM8SB20F32G,EFM8SB20F16G,SLTB005A,EFM8LB11F32E,EFM8UB11F16G,EFM8SB10F2G,EFM8BB21F16G,EFM8SB10F4G,EFM8LB11F16E,EFM8BB10F2G,EFM8SB10F8G,EFM8 FAMILY,EFM8LB12F64E,EFM8LB10F16E,EFM8LB12F32E,EFM8UB10F16G,EFM8UB31F40G,EFM8BB31F32G,EFM8BB31F64G,SLSTK2001A,SLSTK2011A,SLSTK2021A,EFM8BB10F4G,EFM8BB31F16G,EFM8UB30F40G,EFM8BB10F8G,EFM8BB22F16G
雅特力携多款AT32 MCU新品与应用方案亮相2024慕尼黑上海电子展
7月8日,2024慕尼黑上海电子展electronica China在上海新国际博览中心拉开序幕,作为全球电子行业的盛会,汇聚了国内外众多优质电子企业。雅特力携高性能AT32 MCU与应用方案齐亮相,呈现了多款电机控制、工业控制、汽车电子、智能家居、消费、商务,及新能源等应用方案。现场人流攒动、氛围热烈!
原厂动态 发布时间 : 2024-07-17
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
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可定制板装式压力传感器支持产品量程从5inch水柱到100 psi气压;数字输出压力传感器压力范围0.5~60inH2O,温度补偿范围-20~85ºС;模拟和数字低压传感器可以直接与微控制器通信,具备多种小型SIP和DIP封装可选择。
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定制水冷板尺寸30*30mm~1000*1000 mm,厚度1mm~50mm,散热能力最高50KW,承压可达3MPA;液冷机箱散热能力达500W~100KW。项目单次采购额需满足1万元以上,或年需求5万元以上。
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