參數(shù)資料
型號(hào)： PC33975A
廠商： 飛思卡爾半導(dǎo)體(中國(guó))有限公司
英文描述： Multiple Switch Detection Interface with Suppressed Wake-Up and 32mA Wetting Current
中文描述： 多交換檢測(cè)接口，具有抑制喚醒和32毫安濕電流
文件頁(yè)數(shù)： 13/32頁(yè)
文件大?。?/td> 641K
代理商： PC33975A
Analog Integrated Circuit Device Data
Freescale Semiconductor
13
33975
FUNCTIONAL DESCRIPTIONS
FUNCTIONAL TERMINAL DESCRIPTION
MCU INTERFACE DESCRIPTION
The 33975 device directly interfaces to a 3.3 V or 5.0 V
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).
Figure 7
illustrates the configuration between an MCU and one 33975.
Serial peripheral interface (SPI) data is sent to the 33975
device through the SI input terminal. As data is being clocked
into the SI terminal, status information is being clocked out of
the device by the SO output terminal. The response to a SPI
command will always return the switch status, reset flag, and
thermal flag. Input switch states are latched into the SO
register on the falling edge of the chip select (
CS
) terminal.
Twenty-four bits are required to complete a transfer of
information between the 33975 and the MCU.
Figure 7. SPI Interface with Microprocessor
Two or more 33975 devices may be used in a module
system. Multiple ICs may be SPI-configured in parallel or
serial.
Figures 8
and
9
show the configurations. When using
the serial configuration, 48-clock cycles are required to
transfer data in/out of the ICs.
Figure 8. SPI Parallel Interface with Microprocessor
Figure 9. SPI Serial Interface with Microprocessor
33975
MC68HCXX
Microcontroller
Receive
Buffer
Parallel
Ports
To Logic
24-Bit Shift Register
Shift Register
MOSI
SI
MISO
SO
SCLK
CS
INT
INT
Parallel
Ports
MC68HCXX
Microcontroller
33975
33975
SI
SCLK
CS
INT
SI
SO
SCLK
CS
INT
INT
SCLK
MISO
MOSI
Shift Register
SO
Parallel
Ports
MC68HCXX
Microcontroller
33975
33975
SI
SCLK
CS
INT
SI
SO
SCLK
CS
INT
SO
INT
SCLK
MISO
MOSI
Shift Register
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PDF描述
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
PC33975AEK 制造商:FREESCALE 制造商全稱(chēng):Freescale Semiconductor, Inc 功能描述:Multiple Switch Detection Interface with Suppressed Wake-Up and 32mA Wetting Current
PC33975AR2 制造商:FREESCALE 制造商全稱(chēng):Freescale Semiconductor, Inc 功能描述:Multiple Switch Detection Interface with Suppressed Wake-Up and 32mA Wetting Current
PC33981PNA/R2 制造商:MOTOROLA 制造商全稱(chēng):Motorola, Inc 功能描述:High-Frequency, High-Current, Self-Protected High-Side Switch (4.0 mз up to 60 kHz)
PC33984CHFKR2 制造商:Freescale Semiconductor 功能描述:
PC33989DW 制造商:MOTOROLA 制造商全稱(chēng):Motorola, Inc 功能描述:System Basis Chip with High Speed CAN Transceiver
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