參數(shù)資料
型號： C8051F2XX
廠商： Electronic Theatre Controls, Inc.
英文描述： Mixed Signal 8 kB ISP Flash MCU Family
中文描述： 混合信號8 KB的閃存MCU系列的ISP
文件頁數(shù)： 111/146頁
文件大?。?/td> 1856K
代理商： C8051F2XX
C8051F2xx
Rev. 1.6
111
Figure 15.2. SPI Block Diagram
15.1. Signal Descriptions
The four signals used by the SPI (MOSI, MISO, SCK, NSS) are described below.
15.1.1. Master Out, Slave In
The master-out, slave-in (MOSI) signal is an output from a master device and an input to slave devices. It
is used to serially transfer data from the master to the slave. Data is transferred most-significant bit first.
15.1.2. Master In, Slave Out
The master-in, slave-out (MISO) signal is an output from a slave device and an input to the master device.
It is used to serially transfer data from the slave to the master. Data is transferred most-significant bit first.
A SPI slave places the MISO pin in a high-impedance state when the slave is not selected.
15.1.3. Serial Clock
The serial clock (SCK) signal is an output from the master device and an input to slave devices. It is used
to synchronize the transfer of data between the master and slave on the MOSI and MISO lines.
15.1.4. Slave Select
The slave select (NSS) signal is an input used to select the SPI module when in slave mode by a master,
or to disable the SPI module when in master mode. When in slave mode, it is pulled low to initiate a data
transfer and remains low for the duration of the transfer.
Master
Device
MOSI
SCK
Slave
Device
NSS
Slave
Device
NSS
Slave
Device
MISO
P
NSS
VDD
P
P
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