3 Replies Latest reply on Jan 25, 2016 5:05 AM by bob.marlowe

Is PSoC4's UART based on CMOS?

user_350540870 Aug 18, 2017 3:17 PM

Hello All

Is PSoC4's UART based on CMOS? I can't find the answer of this question in the datasheet of UART SCB Component.

Regards

Shaunak

1. Re: Is PSoC4's UART based on CMOS?

bob.marlowe Jan 25, 2016 1:30 AM (in response to user_350540870)

It is of no relevance which technology the UART in the PSoC is "based" on, the communication with the outer world will be made through the GPIOs which are configurable for CMOS input levels. Have a look at the electrical characteristics of the pin component.

Bob
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2. Re: Is PSoC4's UART based on CMOS?

user_242978793 Jan 25, 2016 4:53 AM (in response to user_350540870)

You need a chip similar to a MAX232. This chip converts your digital signal to RS232 levels. It generates the higher level from charge pump o. The chip. Failure to use a chip like this will destroy your Psoc 4 chip.
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3. Re: Is PSoC4's UART based on CMOS?

bob.marlowe Jan 25, 2016 5:05 AM (in response to user_350540870)

Oh, yes! Bob is right ;-) When using an RS232 device you always will need a signal level converter connected to your UART.

Bob
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