參數(shù)資料
型號： ST72C314J4
元件分類： 圖像傳感器
英文描述： CMOS Image Sensor
中文描述： CMOS圖像傳感器
文件頁數(shù)： 124/153頁
文件大?。?/td> 1988K
代理商： ST72C314J4
ST72334J/N, ST72314J/N, ST72124J
72/153
14.4 SERIAL PERIPHERAL INTERFACE (SPI)
14.4.1 Introduction
The Serial Peripheral Interface (SPI) allows full-
duplex, synchronous, serial communication with
external devices. An SPI system may consist of a
master and one or more slaves or a system in
which devices may be either masters or slaves.
The SPI is normally used for communication be-
tween the microcontroller and external peripherals
or another microcontroller.
Refer to the Pin Description chapter for the device-
specific pin-out.
14.4.2 Main Features
s
Full duplex, three-wire synchronous transfers
s
Master or slave operation
s
Four master mode frequencies
s
Maximum slave mode frequency = fCPU/4.
s
Four programmable master bit rates
s
Programmable clock polarity and phase
s
End of transfer interrupt flag
s
Write collision flag protection
s
Master mode fault protection capability.
14.4.3 General description
The SPI is connected to external devices through
4 alternate pins:
– MISO: Master In Slave Out pin
– MOSI: Master Out Slave In pin
– SCK: Serial Clock pin
–SS: Slave select pin
A basic example of interconnections between a
single master and a single slave is illustrated on
Figure 42.
The MOSI pins are connected together as are
MISO pins. In this way data is transferred serially
between master and slave (most significant bit
first).
When the master device transmits data to a slave
device via MOSI pin, the slave device responds by
sending data to the master device via the MISO
pin. This implies full duplex transmission with both
data out and data in synchronized with the same
clock signal (which is provided by the master de-
vice via the SCK pin).
Thus, the byte transmitted is replaced by the byte
received and eliminates the need for separate
transmit-empty and receiver-full bits. A status flag
is used to indicate that the I/O operation is com-
plete.
Four possible data/clock timing relationships may
be chosen (see Figure 45) but master and slave
must be programmed with the same timing mode.
Figure 42. Serial Peripheral Interface Master/Slave
8-BIT SHIFT REGISTER
SPI
CLOCK
GENERATOR
8-BIT SHIFT REGISTER
MISO
MOSI
MISO
SCK
SLAVE
MASTER
SS
+5V
MSBit
LSBit
MSBit
LSBit
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
ST72C314J4B1 制造商:STMicroelectronics 功能描述:ST72FLASH 8K - Bulk
ST72C314J4B6 功能描述:8位微控制器 -MCU Flash 16K SPI/SCI RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
ST72C314J4T1 制造商:STMicroelectronics 功能描述:ST72FLASH 8K - Bulk
ST72C314J4T6 功能描述:8位微控制器 -MCU Flash 16K SPI/SCI RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
ST72C314J4T6 PROGRAMMED 制造商:STMicroelectronics 功能描述:MCU 8-bit ST7 CISC 16KB Flash 3.3V/5V 44-Pin TQFP Tray
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