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MC33993 - Multiple Switch Detection Interface

General Description

of each pin can be found in the Functional Pin Description section beginning on page 9.

8 25 28 9 15, 18 24 16 17 29 30 31 32 GND SI SCLK CS SP0 3 SP4 7 SG0 6, SG13

Key Features

  • a 22-to-1 analog multiplexer for reading inputs as analog. The analog input signal is buffered and provided on the AMUX output pin for the MCU to read.

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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ARCHIVE INFORMATION ARCHIVE INFORMATION Freescale Semiconductor Advance Information Multiple Switch Detection Interface Document Number: MC33993 Rev. 6, 5/2008 33993 The 33993 Multiple Switch Detection Interface is designed to detect the closing and opening of up to 22 switch contacts. The switch status, either open or closed, is transferred to the microprocessor unit (MCU) through a serial peripheral interface (SPI). The device also features a 22-to-1 analog multiplexer for reading inputs as analog. The analog input signal is buffered and provided on the AMUX output pin for the MCU to read. MULTIPLE SWITCH DETECTION INTERFACE The 33993 device has two modes of operation, Sleep and Normal. The Sleep mode provides low quiescent current and enables the wake-up features of the device.