Hi,
we would like you to confirm whether FPD-LINK III serializer can transmit PWM signal to deserializer.
The target frequency range is several hundred kHz to several MHz.
I think that we can use following two methods to realize this.
- 1 - . To use forward channel GPIO.
If user will use video data, we can use GPIO.
According to datasheet, min pulse width depends on Pixel clock.
For example, when PWM frequency is 3 MHz w/ duty 50%, then pulse width is 166ns.
In this case, it is no problem as long as Pixel clock is over 12MHz.
However, I'm not sure when there is no video data, user can send GPIO on forward channel to deserializer or not.
- 2 - . To use bitclock of I2S (I2S_CLK pin).
In this case, I believe that user can send PWM signal without video data (However, in this case maximum PWM frequency is fixed 13MHz.)
However, I'm not sure whether it is allowed that there is no input for LRCLK and DATA.
Could you please confirm following two is available or not ?
1. When there is no video data, user can send GPIO on forward channel to deserializer or not.
2. It is availble that there is no input for LRCLK and DATA for I2S (only input bit clock to serializer).
Best Regards,
