Question
SOF-IRQ when cascading 3 devices of LED1202
Hi,
what is the behaviour of the IRQ-Lines of the LED1202 when connected wired-OR as in chapter 6.2 of datasheet (i.e. clock synchronized 1x Master, 2x Slaves)? I want to use SHFT=1 on all 3 devices.
As per datasheet, the update of the PWM - registers has to be synchronized to the SOF-interrupt to avoid PWM artifacts.
But beeing all 3x IRQ's wired OR together, how should the SOF-IRQs be configured? Only on one device and hope that the clock synchronization regards all devices and all channels?
How do I make sure that I get no PWM-artifacts?
Many thanks & Best Regards
Gerardo