SBOS531E August 2010 – June 2019 AFE031
DAC (Pin 7)
The DAC pin is used to configure the SPI to either read or write data to the Command and Data Registers, or to write data to the DAC register. Setting the DAC pin high allows access to the DAC register. Setting the DAC pin low allows access to the Command and Data Registers.
SD (Pin 8)
The Shutdown pin (SD) can be used to shut down the entire AFE031 for maximum power savings. When the SD pin is low, normal operation of the AFE031 occurs. When the SD pin is high, all circuit blocks within the AFE031, including the serial interface, are placed into the lowest-power operating modes. In this condition, the entire AFE031 draws only 95 μA of current. All register contents at the time the AFE031 is placed into shutdown mode are saved; upon re-enabling the AFE031, the register contents retain the respective saved values.
INT Pin (9)
The Interrupt pin (INT) can be used to signal the microprocessor of an unusual operating condition that results from an anomaly on the ac mains. The INTpin can be triggered by two external circuit conditions, depending upon the Enable Register settings. The AFE031 can be programmed to issue an interrupt on these conditions: