What is CCx update rate in AN4013 timer overview?

[Dmitry Bravikov]

Posted on June 28, 2014 at 11:30

There is equation in AN4013 timer overview:

CCx update rate = TIMx_Counter_CLK / CCRx.What is CCx update rate?Does CCx update rate depend on ARR? #timer #an4013

[Tesla DeLorean]

Posted on June 28, 2014 at 14:37

You'd advance the TIMx->CCRx registers to generate a signal when TIMx->CNT counts past the value

If the Period = 10000, TIMx->ARR = Period-1 If CCx needs to fire 1000 ticks after the prior setting. Ticks are at a frequency dependent on TIMCLK and the prescaler. TIMx->CCR1 = (TIMx->CCR1 + 1000) % Period; To generate multiple frequencies from the different timer channels, you'd have to manage the advancement of the CCRx registers in the CCx interrupts.