when do i need to use RS 232 ??

[ebtehal younis]

i've read about RS 232 and i'm not sure when to use it. i want to connect sensors to a pic MCU using SPI interfacing, so i need to use RS 232 between or not?

 

[bigdogguru]

The RS-232 standard is an asynchronous serial protocol primarily used to establish serial communications between DTE and DCE devices.

For example between a MCU and a PC running an application.

The SPI protocol is a synchronous serial protocol primarily used to establish serial communications between a MCU and a peripheral device.

For example, between an 8051 variant and Real Time Clock (RTC) with a SPI interface.

They are normally never required to be implemented for the same interface.

You might use an RS-232 connection to transmit information to your PC, which originated from a peripheral device attached to your MCU via an SPI interface.

BigDog