Op 23-08-19 om 12:59 schreef The Natural Philosopher:
> On 23/08/2019 11:26, A. Dumas wrote:
>> Audio
>> circuit schematic for the Pi4 at the bottom centre here:
>>
https://www.raspberrypi.org/documentation/hardware/raspberrypi/schematic/rpi_SC
H_4b_4p0_reduced.pdf
>> (audio is identical on the 3 en 4 but they cleaned up the drawing a
>> bit in this version)
>
> Where is the rest of the schematic? What drives PWM1_MOS1 and 2?

Mostly proprietary SoC, Broadcom ARM version with their VideoCore GPU. I
have no idea what's in there, but the Pi doesn't have hardware PWM or
analogue gpio pins.

https://en.wikipedia.org/wiki/Raspberry_Pi#Specifications

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