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November 3, 2010
about 2 weeks ago
I have a question and I would like to know your opinion about it.
I want to connect my MCU whose pins are only tolerant to 3.3v to an RS-232 device.
From what I understand, I could connect my MCU (3.3v logic) to the driver pins, but feed (Vcc) the driver to 5.0v, right? Even if I feed the drive to 5.0v can I connect it to the MCU (3.3v logic)?
The datasheet says on page 8: “This series is ideal for + 3.3V-only systems,
mixed + 3.3V to + 5.5V systems, or + 5.0V-only
systems that require true RS-232 performance. ”
But I can not understand how the driver can distinguish if the output to the MCU should be 5v or 3.3v.
Thanks for your help … and I apologize in advance, if it is obvious. :S
about 3 years ago
Great. SparkFun is awesome! Thank you.
Yes, but…Is it opensource? Where can I find it? I’ve been checked the Git repository, but without luck.
It’s really cool. What about the bootloader? Is it necessary upload a previous bootloader to the ATSAMD21G18? Thanks!
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