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LPC1768 - Problems PWM1.1 output

Question asked by Tom Mitchell on Jul 5, 2016
Latest reply on Jul 14, 2016 by Kerry Zhou

I use the LPC1768.

I have a problem that the first pwm output PWM1.1 (P1[18]) acts different then the other PWM output ports.

I use a period of 1 KHZ. (MR0=1000).

When I change the value for PWM1.1 port from maximum duty cycle (MR1=1001 or MR1=1000) to a new value then the first puls is always 1HKZ long and then all other pulses are the requested duty cycle.

 

This problem is only on PWM1.1. The other PWM ports I use don't have this problem.

 

Is this a known problem ?

Am I doing something wrong ?

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