Hi Geert, On Wednesday, 30 May 2018 12:30:49 EEST Geert Uytterhoeven wrote: > Hi Jacopo, > > On Wed, May 30, 2018 at 11:13 AM, Jacopo Mondi wrote: > > The TW9910 PDN gpio (power down) is listed as active high in the chip > > manual. It turns out it is actually active low as when set to physical > > level 0 it actually turns the video decoder power off. > > So the picture "Typical TW9910 External Circuitry" in the datasheet, which > ties PDN to GND permanently, is wrong? The SH PTT2 line is connected directory to the TW9910 PDN signal, without any inverter on the board. The PDN signal is clearly documented as active-high in the TW9910 datasheet. Something is thus weird. Jacopo, is it possible to measure the PDN signal on the board as close as possible to the TW9910 to see if it works as expected ? -- Regards, Laurent Pinchart
