Hi, i tryed to set four AD7779 in daisy chain mode. So i need sync all ADs to get sync RDY signals on them and sync data sample start time on all ADs.
We set FORMAT0 = 1 and FORMAT1 = 1 to use SPI mode.
All registers read and write fine by SPI Master, so we config dec rate, DCLK divider and MCLK divider as we need and get fine results, but when we try to write SYNC (AD7779_REG_GENERAL_USER_CONFIG_2 bit0) nothing happens on SYNCOUT line no matter 0 or 1 we write. START pin connected to GND.
PIC.1 - START of controller - 4 RDY and SYNC (global line for all ADs). SYNC triggred only on start and after always in low level.