> The following is a datasheet of proc uart.
Does BCM20737 support smartcard mode like UART of PRoC/PSoC?
or Is it possible to change the RX/TX pin in single pin?
SmartCard (ISO7816) mode operation
ISO7816 is an asynchronous serial interface, defined with “single-master-single-slave” topology.
Only the master (reader) function is supported in the component.
SCB provides the basic physical layer support with asynchronous character transmission, and only “I/O” pin interface of standard ISO7816  pin list is provided. SCB UART TX line will be connected to SmartCard I/O line, by internally multiplexing between TX and RX control modules. The higher level protocol implementation is left for firmware to handle from the user level.
please let me know if you need more information.
Thanks and Regards
The 20737S module solution does not require such a multiplexed scheme as it has dedicated uart tx/rx pins. Check out pin 18 and 19 in the datasheet.
Thank you for your answer.
I checked module datasheet.
So, Is it possible to change RX/TX pin in single pin at CYW20736(not module)?
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It is the same dedicated two-pin arrangement in the SoC. Check out pin 12 and 13 of the SoC.
It is not possible to multiplex them. The point is why would one want to do that if they are dedicated?
Application is like smart card reader.
It should be one pin because of 'matching'.
So I can't use TR.
Do you have any better ideas about ISO7816?