Precision PWM in microcontroller

From: The Mind Factory INC (rsloan2003_at_hotmail.com)
Date: 12/29/03 

Date: Sun, 28 Dec 2003 20:46:40 -0500

Looking for a 1hz resolution PWM in a small micro.... 0-20Khz preferred duty
cycle is 50/50 but can be off this a bit....

Any ideas, have searched high and low and found nothing.

Richard.