of each terminal can be found in the System/Application Information section beginning on page 9.
Terminal 1 2 3 4 5 *8 25 *28 9 *15, 18 *24 16 17 29 30 31 32 Terminal Name GND SI SCLK CS SP0 *3 SP4 *7 SG0 *6, SG13 *7 VPWR WAKE INT AMUX VDD SO F
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 f
MC33972 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 The 33972 device has two modes of operation, Normal
Datasheet Details
MC33972
Motorola
506.66 KB
Multiple switch detection interface.
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