【应用】USB转串口芯片CH340E用于智能门锁，内置晶振，支持波特率2400-115200bps

时间： 2023-03-29 来源：世强

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为了防止智能门锁突然没电而导致开不了门，厂家一般会设计应急开锁方案。本文就此介绍了沁恒的USB转串口芯片 CH340E在智能门锁应急开锁方案中的应用。

在智能门锁系统中，可通过USB接口与USB转串口芯片CH340E连接，串口再和电机驱动器连接，驱动锁内电机转动，从而实现开锁。大致框图如下所示。

CH340E具有如下特点：

1、CH340E已内置晶振，无需再外部设置。

2、支持5V电源电压和3.3V电源电压，可满足大部分的供电场景。

3、单芯片集成式解决方案，减少客户对于USB转串口的程序开发，加快产品的设计。

4、CH340E在市面上相比同类型的产品价格和交期都有优势。

沁恒的CH340系列可提供SOP-16、SOP-8和、SSOP-20以及ESSOP-10、MSOP-10等多种封装，用户可根据自己的需求做选择。

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沁恒（WCH）通讯接口芯片和全栈MCU选型指南

目录- 企业简介接口转换产品 MCU产品选型 USB转串口产品选型低功耗蓝牙系列单片机系列网络系列 USB系列 USB PD协议系列 PCI/PCIE 系列显示驱动及键盘扫描系列单片机外围系列产品方案

型号- CH32V103C6T6,CH32F205RBT6,CH343G,CH32F203C8T6,CH343K,CH573F,CH378,CH440G,CH571K,CH32V208WBU6,CH583M,CH32V208RBT6,CH341T,CH32F103C6T6,CH32V305RBT6,CH342F,CH384,CH342K,CH32F103C8U6,CH340K,CH582M,CH340N,CH340T,CH32V208GBU6,CH341B,CH341A,CH571F,CH341F,CH32V203C8T6,CH486F,CH571D,CH368,CH484M,CH32V307,CH582F,CH340E,CH482,CH32F203C8U6,CH32V305,CH481,CH32V203C8U6,CH340C,CH484,CH32V303,CH483,CH486,CH340G,CH246,CH578,CH457,CH32V303VCT6,CH577,CH335,CH456,CH552T,CH579,CH552P,CH577F,CH32F203C6T6,CH9344,CH451,CH450,CH444G,CH453,CH452,CH334,CH455,CH454,CH9328,CH348,CH9329,CH224P,CH9326,CH34B,CH9342G,CH32F208RBT6,CH581,CH583,CH341,CH462,CH32F203VCT6,CH32F208WBU6,CH582,CH340,CH552E,CH343,CH342,CH463,CH552G,CH345,CH224,CH443K,CH344,CH556,CH555,CH558,CH557,CH559,CH317,CH438,CH224D,CH32V203C6T6,CH442E,CH552,CH551,CH554,CH224K,CH551G,CH343P,CH567,CH446,CH445,CH569,CH448,CH568,CH440R,CH449,CH440P,CH573X,CH9340K,CH9340C,CH32F207VCT6,CH440,CH442,CH344L,CH565,CH444,CH443,CH32V303RCT6,CH32V103R8T6,CH448F,CH9103M,CH9143,CH557Q,CH9140,CH532,CH9142,CH545L,CH531,CH9141,CH545,CH544,CH423,CH547,CH546,CH549,CH548,CH32F103R8T6,CH32F203RCT6,CH541,CH540,CH543,CH422,CH542,CH554T,CH445P,CH554P,CH32V303RBT6,CH9101U,CH579F,CH9101H,CH32V307RCT6,CH32V203K8T6,CH555L,CH9121,CH9120,CH579M,CH522,CH9102X,CH525,CH444P,CH524,CH527,CH528,CH578F,CH554E,CH9344L,CH578M,CH348L,CH554G,CH348Q,CH521,CH9102F,CH9350,CH483M,CH32F203CBT6,CH32V103C8T6,CH483X,CH549L,CH549F,CH549G,CH581F,CH32F103C8T6,CH32F207,CH32F205,CH559T,CH32F203,CH32V103C8U8,CH482X,CH32F208,CH548G,CH32V208,CH548L,CH32V203,CH548N,CH32V208CBU6,CH558T,CH32V303CBT6,CH547G,CH392,CH547F,CH482D,CH395,CH559L,CH547L,CH397,CH32F103,CH546G,CH32V103,CH558L,CH546L,CH481D

2022/01 - 沁恒 - 选型指南代理服务技术支持现货查询批量订货

USB 转串口芯片 CH340 手册

型号- CH340K,CH340N,CH340E,CH340T,CH340C,CH340,CH340B,CH340R,CH340X,CH340G

2024/01/03 - 沁恒 - 数据手册 - 版本：3C 代理服务技术支持现货查询批量订货

CH340 USB转串口芯片数据手册

型号- CH340K,CH340N,CH340E,CH340C,CH340,CH340B,CH340R

2021/12/17 - 沁恒 - 数据手册代理服务技术支持现货查询批量订货查看更多版本

USB 转串口芯片CH9102A手册

型号- CH9102A

2024/6/13 - 沁恒 - 数据手册 - 版本： 1 代理服务技术支持现货查询批量订货

沁恒USB转单串口芯片选型表

沁恒USB转单串口芯片选型表提供USB高速/全速转串口系列芯片，可实现USB转1/2/4/8路串口，支持串口I/O独立供电，支持VCP/HID/CDC/AOA转串口，VCP串口支持硬件流控和高波特率大数据连续传输，部分型号支持VID/PID/String等内容配置，支持Windows/Linux/Android/macOS等操作系统。

RTS/CTS/DTR/DSR/DCD/RI

选型表 - 沁恒立即选型

【应用】沁恒USB转串口芯片CH340N用于消费类电子产品，采用SOP-8封装，无需外部晶振

沁恒推出的USB转串口CH340N可广泛应用于消费类产品中，实现将MCU串口信息通过USB打印到上位机终端，采用标准8脚贴，尺寸比较小，而且内部已集成时钟电路无需外部晶振，用户使用比较简单，完全满足普通用户的串口调试功能。

2022-07-27 - 应用方案代理服务技术支持现货查询批量订货

沁恒（WCH）USB转串口芯片选型表

描述- 南京沁恒微电子股份有限公司成立于2004年，是一家通讯接口芯片和全栈 MCU 芯片公司。沁恒专注于连接技术和 MCU 内核研究，基于自研收发器 PHY 和处理器 IP 的全栈研发模式，取代传统的外购 IP 整合模式，提供以太网、蓝牙无线、 USB 和 PCI 类等接口芯片，及集成上述接口的连接型互联型／无线型全栈 MCU ＋单片机。

型号- CH344Q,CH340K,CH340N,CH340T,CH9101U,CH9101H,CH341B,CH341A,CH9103M,CH341F,CH343G,CH9143,CH343K,CH343P,CH347,CH9102X,CH9326,CH9340K,CH341T,CH9340C,CH9342G,CH9344L,CH340E,CH342F,CH348L,CH340C,CH340B,CH342K,CH348Q,CH344L,CH340G,CH9102F

沁恒 - 选型指南代理服务技术支持现货查询批量订货