According to the datasheet for the 18F4320 (DS39599B) the internal
oscillator runs at 8MHz.
If I am correct, the datasheet tells me that the internal oscillator is not
divided by 4 in the way an external timing source would be (crystal, clock,
resonator...applied to OSC1 and OSC2 pins). For USART configuration, should
I use a value of 32MHz (8MHz * 4) as the FOSC value in the baud rate
equation FOSC/(16(x+1))? I am having problems with USART communications...it
does not work and I believe the problem may be that I have done the baud
rate calculation using the 8MHz INTOSC value as FOSC in the equation above.
I have successfully done rs-232 on 16F family PIC's with no problems and
understand the details of UART / USART configuration but this is my first
time on the 18F family with an internal oscillator.
Am I on the right track?

Regards,
Stephen D. Barnes

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