Thank you

maximum frequency will be around 1000 Pulses/sec

Quote Originally Posted by HenrikOlsson View Post
What type of frequency are we talking about here? If it's rather low frequency, like a knob used to navigate a user interface etc then perhaps using the 'Change-on-PortB' interrupt and decode and keep count in software. If we're talking higher frequencies, like for motorcontrol etc then you might want to look at the 18F24x1 series PICs as they have a QEI-module on board. In any case - use the USART for comms.