Hi, I think that many of You have the same problem - use the same lines to for example communicate with 2 or more parts, because there are no free pins in mcu for example.
I have the same problem and I’ll really happy if You could help me.
MC60 communicate with mcu PIC24FJ128GA202 by uart - mcu uses TX and RX line.
Mcu has a PPS function, so for the same pines I can use for uart, spi etc.
I want use RX and TX which is connected to MC60 (uart) to SPI communicate for example with flash memory. Is there any problem when for example MC60 is disconnected from power supply, but there will be some signal (SPI data) on for example MC60’s RX ?
I’ll make configuration pins as it should be done, but question is - it will be ok, when some voltage will be presents on for example MC60’s line when this part is disconnected from power supply ?