In addition to controlling synchronization, the SYNC/PDWN pin also serves as the control for Power-Down mode and offset calibration. To enter this mode, hold the SYNC/PDWN pin low for at least 219 CLK periods. While in Power-Down mode, both the analog and digital circuitry are completely deactivated. The digital inputs are internally disabled so that is not necessary to shut down CLK and SCLK. To exit Power-Down mode, return SYNC/PDWN high on the rising edge of CLK.
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