Hello,
In my project, I m using a MAX233A to convert a RS232 signal to UART to control a microcontroller.
I generate my RS232 signal with a usb-rs232 cable and using Putty.
This is what I generate by sending the "j" character.
I use a MAX233A as below:
So I look at the UART signal generated by the component: ( letter j)
The signal should be TTL and the LOW level is about 1V and Hight level 3.7 V with a big oscillation.
I checked all the grounds, they seem to be good. The supply voltage is 4.8 V.
Do you have any idea what's going on?
Thank you