Connecting ARM controller to TTL logic levels

I have an LPC2119 controller. The GPIO pins operate on 0-3.3V levels. I wish to interface this to an LCD controller which operates on 0 to 5V (the minimum input value recognised as high is 3.5V), therefore...
Connecting ARM controller to TTL logic levels

I have an LPC2119 controller. The GPIO pins operate on 0-3.3V levels. I wish to interface this to an LCD controller which operates on 0 to 5V (the minimum input value recognised as high is 3.5V), therefore...
TTL TO RS 232

HI, I am super confused why we need to use ttl to rs 232 conversion and rs232 to ttl conversion. please help...
TTL TO RS 232

HI, I am super confused why we need to use ttl to rs 232 conversion and rs232 to ttl conversion. please help...
3.3V supply for ttl/rs232

Hi, I find a problem when I wanted to run a ATMEGA32 with VCC supply of 3.3V, everything is okay except USART. I see that if supply voltage is 5V then USART works well. With the same ttl/rs232 module...