You have to use an external crystal to get a lower frequency from what I understand about this part. The internal oscillator is designed for the 7.(something) frequency. Slower speed would be attained by afixing a slower crystal such as 3.579 MHz or 2.4576 MHz for example. (You can pick any available frequency you wish. I showed those becasue the first is one that is low cost color burst frequency from TV application and the other is a frequency that is closely compatible with being able to be used to generate good UART clock at slower baud rates).

Michael Karas


I suppose if you have 250K Euros laying around maybe you could get Philips to make you a special lot of LPC932/JC'S that have a ring oscillator of a different frequency.