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Freescale Semiconductor, Inc.
MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
Document order number: MC33972 Rev 3.0, 12/2004
Advance Information 33972 Multiple Switch Detection Interface with Suppressed Wake-Up
The 33972 Multiple Switch Detection Interface with Suppressed Wake-Up 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 terminal for the MCU to read.
MULTIPLE SWITCH DETECTION INTERFACE WITH SUPPRESSED WAKE-UP
Freescale Semiconductor, Inc...
MC33972 Datasheet
