MC33CD1030AE

The two modes of operation for the CD1030 device mentioned in the document are Normal mode and Low-power mode (LPM) .

The purpose of the CD1030 device is to detect the closing and opening of up to 33 switch contacts and transfer the switch status to a microprocessor unit through a serial peripheral interface (SPI). It also features individually selectable input currents in Normal and Low-power modes, a 35-to-1 analog multiplexer for reading inputs as analog, a battery and temperature monitor, and two modes of operation - Normal and Low-power mode. The device interacts with external connections and reports switch state changes to the MCU via the SPI protocol, requiring external protection measures such as ESD capacitors and series resistors. Additionally, it requires a blocking diode on the VBATP pin to protect from reverse battery conditions. The inputs are capable of surviving reverse battery without a blocking diode and contain an internal blocking diode to prevent back feeding of voltage/current into the IC.

The CD1030 can detect the closing and opening of up to 33 switch contacts.