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Author Topic: RTS/CTS Flow Control Thersholds  (Read 631 times)

ppeter

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RTS/CTS Flow Control Thersholds
« on: April 14, 2018, 02:12:08 PM »

Hello,

there is little information on the RTS/CTS hardware flow control behaviour in the datasheets, e.g. for FT230X.

* At which buffer fill level will RTS be negated, when will it be asserted agian? How quickly has the sender to stop sending/how many bytes can still be sent without loss, even if RTS was negated?
* How many bytes should I expect to receive in a MCU from e.g. FT230X when the converter's CTS line is deasserted, i.e. when should the MCU negate its RTS line to stop the serial converter in time.

Thanks!
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FTDI Community

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Re: RTS/CTS Flow Control Thersholds
« Reply #1 on: April 16, 2018, 10:18:20 AM »

Hello,

Please see the following links which should help:

How does RTS/CTS flow control work in an FTDI chip?

Flow Control

AN232B-04 Data Throughput, Latency and Handshaking

Best Regards,

FTDI Community
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ppeter

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Re: RTS/CTS Flow Control Thersholds
« Reply #2 on: April 16, 2018, 12:03:48 PM »

This is exactly what I was looking for. Thanks a lot.
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