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FLEXEL-1 PWM Question

Have any of you tried to enter a PWM value outside of the 500 to 2500 ms range for configuration 1 (RC Servo) on the FLEXEL-1 chip?  I would like to drive a couple of L298's with this and would like to have the full range of duty cycle.  Do values outside of the 500 to 2500ms throw an error?