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USB RS232
FT232RL

USB RS232 to RJ45 cable

FT232RL + ZT213 chip

USB2.0 compatible, full speed

TX, RX,CTS,RTS,DCD,RI,DSR,DTR,VCC,GND

300 ~ 1Mbps baud rate

RJ45 8P8C

Android, Win 7/8, Mac, Linux workable


About FT232RL

The FT232R is the latest device to be added to FTDI?s range of USB UART interface Integrated Circuit Devices. The FT232R is a USB to serial UART interface with optional clock generator output, and the new FTDIChip-ID? security dongle feature. In addition, asynchronous and synchronous bit bang interface modes are available. USB to serial designs using the FT232R have been further simplified by fully integrating the external EEPROM, clock circuit and USB resistors onto the device.

The FT232R adds two new functions compared with its predecessors, effectively making it a "3-in-1" chip for some application areas. The internally generated clock (6MHz, 12MHz, 24MHz, and 48MHz) can be brought out of the device and used to drive a microcontroller or external logic. A unique number (the FTDIChip-ID?) is burnt into the device during manufacture and is readable over USB, thus forming the basis of a security dongle which can be used to protect customer application software from being copied.

  • Single chip USB to asynchronous serial data transfer interface.
  • Entire USB protocol handled on the chip - No USB-specific firmware programming required.
  • UART interface support for 7 or 8 data bits, 1 or 2 stop bits and odd / even / mark / space / no parity.
  • Fully assisted hardware or X-On / X-Off software handshaking.
  • Data transfer rates from 300 baud to 3 Megabaud (RS422 / RS485 and at TTL levels) and 300 baud to 1 Megabaud (RS232).
  • In-built support for event characters and line break condition.
  • New USB FTDIChip-ID? feature.
  • New configurable CBUS I/O pins.
  • Auto transmit buffer control for RS485 applications.
  • Transmit and receive LED drive signals.
  • New 48MHz, 24MHz,12MHz, and 6MHz clock output signal Options for driving external MCU or FPGA.
  • FIFO receive and transmit buffers for high data throughput.
  • 256 Byte receive buffer and 128 Byte transmit buffer utilising buffer smoothing technology to allow for high data throughput.
  • Adjustable receive buffer timeout.
  • Synchronous and asynchronous bit bang mode interface options with RD# and WR# strobes.
  • New CBUS bit bang mode option.
  • Integrated 1024 bit internal EEPROM for I/O configuration and storing USB VID, PID, serial number and product description strings.
  • Device supplied preprogrammed with unique USB serial number.
  • Support for USB suspend / resume.
  • Support for bus powered, self powered, and high-power bus powered USB configurations.
  • Integrated 3.3V level converter for USB I/O .
  • Integrated level converter on UART and CBUS for interfacing to 5V - 1.8V Logic.
  • True 5V / 3.3V / 2.8V / 1.8V CMOS drive output and TTL input.
  • High I/O pin output drive option.
  • Integrated USB resistors.
  • Integrated power-on-reset circuit.
  • Fully integrated clock - no external crystal, oscillator, or resonator required.
  • Fully integrated AVCC supply filtering - No separate AVCC pin and no external R-C filter required.
  • UART signal inversion option.
  • USB bulk transfer mode.
  • 3.3V to 5.25V Single Supply Operation.
  • Low operating and USB suspend current.
  • Low USB bandwidth consumption.
  • UHCI / OHCI / EHCI host controller compatible.
  • USB 2.0 Full Speed compatible.
  • -40°C to 85°C extended operating temperature range.


如何快速安装USB串口驱动

      很多客户买了USB转串口线后不知怎么使用,其中最多的是安装驱动的问题,现给大家详细介绍下具体操作方法。有需要的朋友们,可以一起来看看(以CP2102为例, PL2303, FT232RL安装过程想似)。
推荐:win7 64位系统下载
1、请先不要插USB-串口转换线,点击下载USB转串口驱动,下载完成后打开按照下面的步骤进行安装;
2. 下载后存到电脑,并记下存放路径
3. 插上USB转串口线,这时会出现以下提示:

CP2102和PL2303芯片的会弹出以下提示:


点击否,点击下一步,选择从列表或指定位置安装

再点下一步;

输入刚才下载的驱动的存放路径

点击确定,再回到上一步的窗口

点击是否继续的对话框,当然点继续啦
出现复制文件进度,会很快的啦

在接下来的窗口中,点击完成

安装完成后电脑硬件会出来一个虚拟串口

注意不能出现黄色的感叹号才算正确安装完成,USB转串口线才能正常工作
同时还要记住是COM几,因为后面下载软件还会用到。

PL2303TA, PL2303HXD在WINDOWS安装驱动和以上类似,但FT232RL会有不同,FTDI的芯片会更简单(当然也说明贵有贵的道理,嘿嘿)
FTDI芯片的USB串口线插上后,可以自动安装(以前是WINDOWS嵌入的驱动,但由于芯片和系统已经更新过很多次啦,就只有让WINDOWS自动下载最新驱动(这种方法比较好,至少可以防止那些乱七八糟的驱动下载网站所带的广告或病毒)
插上去后就这样

安装后就会显示

省去了很多手脚,一步自动完成,这就是FTDI芯片的USB串口线优点之一



还有一些朋友安装后说没有通讯,那就要看看以下问题:
一, 是不是软件设置里面串口号是不是一致,有些终端软件串口只能设COM1到COM8,这样您就需要在串口列表中将串口号改为1-8中的其中的一个,串口号一致后,电脑和设备就能互相找到对方了

二, 看TXD,RXD有没有接反, 本人从事USB转串口产品有十多年了,遇到最多也是最容易搞混淆的概念就是DTE和DTC的TXD和RXD, 用一个大家比较容易接受的比方来说,大家就明白了,就好象在要两个水池中间搭建一个水温冷却循环系统, 这样,一边的送水管(TXD)必须接要接另一端的进水管(RXD),进水管要接到对方的送水管(TXD)这样水才能循环起来。 用到串口中,就是说,设备的TXD,必须要接到电脑的RXD, RXD必须要接到TXD, TXD就是数据发送,RXD就是数据接收。 但这个TXD和RXD有个相对相言的, TXD/RXD必须是相对电脑或设备而言, 也就是DTE和DTC

三,就看你是不是没搞清楚设备是什么信号就胡乱的买了一根线接上去就用了。 串口最常用的是RS232,但还有一种TTL(有TTL1.8V电平,TTL3.3V电平, TTL5V电平),还有RS485啦,RS422等,都称为串口信号,如果所买的线和设备信号不一致就当然不能通信了,就象讲不同语言的人不能交流一样,不同信号类别是不能互发数据的,至少是乱码。那恐怕您要联系厂家重新买线了。

再附上一点有用的知识:如何辨别RS232,TTL信号?
打开设备,并让设备处在发送数据的模式下,这时用万表测试发送信号的PIN脚和GND(注意万用表打在测试直流电压挡,20V),如果是RS232信号,会出现一个9-12V的电压,如果是TTL就会出出一个1.8V/3.3V/5V的电压,当然不完全是这个数值,根据测试环境会稍有差异。 同样的道理,可以没出线是什么信号啦。

今天就分享到这里了,有问题欢迎咨询我们信和康技术在线解答或电话

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