MCZ33972AEK Freescale Semiconductor, MCZ33972AEK Datasheet - Page 13
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MCZ33972AEK
Manufacturer Part Number
MCZ33972AEK
Description
IC MULTIPLE SWITCH DETECT 32SOIC
Manufacturer
Freescale Semiconductor
Datasheet
1.MCZ33972AEK.pdf
(32 pages)
Specifications of MCZ33972AEK
Applications
Switch Monitoring
Interface
SPI
Voltage - Supply
8 V ~ 26 V
Package / Case
32-SOIC (7.5mm Width) Exposed Pad, 32-eSOIC, 32-HSOIC
Mounting Type
Surface Mount
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
MCZ33972AEK
Manufacturer:
FREESCALE
Quantity:
20 000
Part Number:
MCZ33972AEKR2
Manufacturer:
FREESCALE
Quantity:
20 000
MCU INTERFACE DESCRIPTION
microcontroller unit (MCU). SPI serial clock frequencies up to
6.0 MHz may be used for programming and reading switch
input status (production tested at 4.16 MHz).
illustrates the configuration between an MCU and one 33972.
device through the SI input pin. As data is being clocked into
the SI pin, status information is being clocked out of the
device by the SO output pin. The response to a SPI
command will always return the switch status, interrupt flag,
and thermal flag. Input switch states are latched into the SO
register on the falling edge of the chip select (
Twenty-four bits are required to complete a transfer of
information between the 33972 and the MCU.
system. Multiple ICs may be SPI-configured in parallel or
serial.
the serial configuration, 48-clock cycles are required to
transfer data in / out of the ICs.
Analog Integrated Circuit Device Data
Freescale Semiconductor
The 33972 device directly interfaces to a 3.3 or 5.0 V
Serial peripheral interface (SPI) data is sent to the 33972
Two or more 33972 devices may be used in a module
Microcontroller
MC68HCXX
Shift Register
Figures 9
Figure 8. SPI Interface with Microprocessor
Receive
Parallel
Buffer
Ports
and
10
MOSI
MISO
SCLK
INT
show the configurations. When using
INT
SO
CS
SI
FUNCTIONAL DEVICE OPERATION
24-Bit Shift Register
Figure 8
CS
33972
To Logic
) pin.
OPERATIONAL MODES
Figure 9. SPI Parallel Interface with Microprocessor
Microcontroller
Figure 10. SPI Serial Interface with Microprocessor
Microcontroller
MC68HCXX
MC68HCXX
Shift Register
Shift Register
Parallel
Parallel
Ports
Ports
INT
INT
SCLK
MOSI
MISO
SCLK
MOSI
MISO
FUNCTIONAL DEVICE OPERATION
OPERATIONAL MODES
SI
SCLK
CS
INT
SI
SO
SCLK
CS
INT
SI
SO
SCLK
CS
INT
SI
SO
SCLK
CS
INT
SO
33972
33972
33972
33972
33972
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