On MCIMX8M-EVK the CPU signal UART3_CTS is connected to WiFI/BT signal BT_UART_CTS.
The BT_UART_CTS signal is an INPUT, the CPU signal UART3_CTS is also an INPUT.
Is this a mistake?
Should not be:
CPU CTS -> BT RTS
CPU RTS -> BT CTS
The RX/TX signals are correct connected:
CPU RX -> BT TX
CPU TX -> BT RX
Hi, llko
>>Is this a mistake?
No, it isn't.
see below, please!
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UART has 2 different working mode, one is DCE mode, the other is DTE mode.
In DCE mode, CTS_B is output .
Have a nice day!
TIC weidong sun
Hi,
Thank you for the answer.
I read already about DTE and DCE, but on MCIMX8M-EVK the TX and RX are crossed:
CPU TX -> WIFI RX
CPU RX -> WIFI TX
the CTS/RTS not:
CPU CTS -> WIFI CTS
CPU RTS -> WIFI RTS
The wiring on the schematics doesn't match neither DTE nor DCE.
Regards,
Ilko Iliev