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  1. How does TTL serial work? - Electrical Engineering Stack Exchange

    Point of terminology: "TTL serial" is a severely over-broad term, " (point-to-point) asynchronous serial (at TTL levels)" seems to be what you're asking about. (Though that's still probably lacking, but at least …

  2. 问一下大家什么是USB转TTL? - 知乎

    Aug 15, 2020 · USB转TTL是一种 串口通信 转换器,它可以将USB接口转换为TTL串口通信接口。 TTL串口通信是一种常见的数字通信方式,常用于单片机、传感器等设备之间的数据传输。 通过USB …

  3. 什么叫TTL电平? - 知乎

    TTL电平信号被利用的最多是因为通常数据表示采用二进制规定,+5V等价于逻辑"1",0V等价于逻辑"0",这就被称做TTL (晶体管-晶体管逻辑电平)信号系统,这是计算机处理器控制的设备内部各部分 …

  4. uart、串口、COM口、USB口,ttl,rs232,rs485这几个到底是啥关系?

    1. TTL电平 TTL指双极型三极管逻辑电路(transistor transistor logic),这种信号0对应0V,1对应3.3V或5V,与单片机、MCU、SOC的IO电平兼容。 不过实际也不一定是TTL电平,因为现在大部分数字逻 …

  5. rs232 - What is the difference between RS-232 and TTL UART ...

    Dec 11, 2016 · A TTL UART will output (and input) only TTL levels, essentially 0 bit = 0V and 1 bit = 5V. And many modern-day gadgets (Arduino, et.al.) simply use TTL voltage levels for serial communication.

  6. transistors - TTL, Totem Pole vs. Open Collector Output - Electrical ...

    Mar 21, 2018 · What is the difference of these two ttl nand gates? What is a totem pole, what does it do and what is it used for? When connecting multiple ttl logic gates together is it better to use one or the...

  7. TTL和CMOS电路输入端电压多少可认为高电平(低 ... - 知乎

    TTL指的是由晶极管构成的 数字芯片。这类芯片功耗高,通常的TTL电平是5V。 CMOS是指由 MOS管 构成是数字芯片。这类芯片功耗低。 电平 太多了有5V,3.3V,1.8V,1.2V。 你问的高低电平的阈值 …

  8. 1×9封装TTL光模块有哪些优势? - 知乎

    优异静态功耗: 待机状态下,TTL 光模块静态电流通常 <10mA,比 PECL 光模块(20-50mA)降低 50% 以上,尤其适合电池供电设备,如物联网传感器和便携式仪器。 宽范围低电压工作: 支持 3.3V 或 …

  9. USART, UART, RS232, USB, SPI, I2C, TTL, etc. what are all of these and ...

    Aug 14, 2012 · TTL mean Transistor-Transistor-Logic and has its level for logical zero near 0V and for logical one near 5V. Often any 5V logic is called TTL, although most circuits nowadays are built as …

  10. 既然IP数据包有TTL跳数限制,那它是如何实现远距离(横跨大半个地 …

    既然IP数据包有TTL跳数限制,那它是如何实现远距离(横跨大半个地球)通信的? 首先对问题进行补充解释一下:IP数据包有TTL跳数限制,跳数变为零时数据包就被丢弃。 那么问题来了,当需要远距离 …