- #Usb to serial connector frys electronics serial#
- #Usb to serial connector frys electronics full#
- #Usb to serial connector frys electronics plus#
#Usb to serial connector frys electronics full#
Any USB host to which this is accidentally connected would likely thrash in confusion for a bit every time one of the data lines changed in a way that falsely suggested a USB low or full speed device had just been plugged in. Logically speaking of course, your UART signal look nothing like any sort of USB at all. USB devices may often be robust, but do you want to count on that? And even if your MCU were driving its transmit with 3v3 levels, that doesn't necessarily mean you might not accidentally get a USB-UART cable which gave 5v output on its transmit - many (though not all!) MCUs are explicitly tolerant of mild overvoltage on their UART pins (eg the pins will have a "5v tolerant" legend in the data sheet). Many more modern MCUs would run at 3v3 which you would regulate inside your device from the 5v input, but the ATmega is in an older process which cannot quite officially run at full speed with only 3v3 supply, so there's a good chance you are using logic voltages that would be outside the USB spec.
#Usb to serial connector frys electronics serial#
So in terms of causing damage the main question is if your MCU serial port is operating at 3v3 or 5v.
There are two parts to this, electrical and logicalĮlectrically speaking, the (initial) signal voltage of the legacy USB data pair is comparable to that of 3v3 logic. Question: Are FTDI signals RX and TX the type to be sent on pins D- and D+ ? Would sending them on these pins be complaint to the standard? I would not connect FTDI RTS used to reset, would have to reset with a button on the board, unless there is a pin I could use for RTS and be compliant with the USB C spec. I would short the two D+ pins and the two D- pins on the PCB per paragraph 1.3.1 page 4. I would not be using pins CC and VCONN connections. Reading the USB-C data sheet, could I avoid accidental damage by only using GND, VBUS, D-, D+ as shown Figure 4 page 7, USB 2.0 TYPE C Pinout?
#Usb to serial connector frys electronics plus#
This plus the modern/reversible connector. The reason I want to use the USB-C for my product is not technical: The availability of high end power cables - cloth braided, colors, nice connectors. Yes, being incompatible with USB-C standard could cause damage. I know it is overkill using USB-C, but being flippable will be a benefit to the user.
It may be a simple question, but reading a lot about USB-C made me question myself. Question: Can I simply connect the 6 wire output from the FTDI Friend to the the USB-C as shown below? Connecting opposite pins on the PCB to allow connector to be flipped? I am not using any of the advanced capabilities of the USB-C, simply the reversible features of the pins.
This will allow me to connect through the housing via the USB-C connector to not only provide power but to also program it without having to take the assembly apart to accesss the 6 pin header. I want to connect the FTDI Chip Adapter to the board using a USB-C Connector instead of the 6 pin header. The adapter connects to a 6 pin FTDI header on the PCB. I have a PCB with an Atmega328 and have been programming it using FTDI Friend (FT232RL Chip Adapter).