PC to MCU Serial communication connector

[chandlerbing65nm]

Hi folks,

I have this ADM3202 in my board which is to be used to communicate serially from PC to MCU and vice versa. It's main functions are to send commands from PC-MCU and receive sensor data (fprintf) from MCU-PC only.

I wonder what external connector should I use to connect it to my PC.

1. DB9 RS-232 Serial to Terminal adapter Connector Breakout Board

2. FTDI Serial TTL-232 USB Cable

I don't have the actual hardware yet and the board, so there is no way I can test it practically.
If someone can help, thank you very much!

Regards,
Chandler

 

[KlausST]

Hi,

The ADM3202 is a TTL to RS232 transmitter IC.
So you need an interface which is RS232 compatible. That´s all.

If your PC still has mature RS232 ports, then you may use the DB9 board and a RS232 cable.

But you may also use a USB to (true) RS232 converter. We can´t see whether the shown USB cable works with TTL levels or RS232 levels.
You need to be sure that there are true RS232 levels.

Note: RS232 lines need to be crossed: Tx of one device needs to go to Rx of the other device and vice versa.

Klaus

 

[FvM]

The FTDI cable series is named TTL-232xxx because it uses logic (TTL) level. 3.3V and 5V versions are available.