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VNC2-48Q1B-TRAY 参数 Datasheet PDF下载

VNC2-48Q1B-TRAY图片预览
型号: VNC2-48Q1B-TRAY
PDF下载: 下载PDF文件 查看货源
内容描述: [Vinculum-II Embedded Dual USB Host Controller IC]
分类和应用:
文件页数/大小: 88 页 / 2234 K
品牌: FTDI [ FUTURE TECHNOLOGY DEVICES INTERNATIONAL LTD. ]
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Datasheet  
Vinculum-II Embedded Dual USB Host Controller IC  
Version 1.7  
Document No.: FT_000138 Clearance No.: FTDI#143  
6.3.2 Full Duplex  
In full duplex mode, the SPI slave sends data on MISO line at the same time as it receives data on MOSI.  
During the command phase this data is always the slave status byte. For a write command, write data  
can be streamed out of MOSI and status can be sent during each write phase from slave to master. As  
long as the slave status indicates that it can receive more data, the master can continue to stream  
further write bytes. Figure 6.5 is an example of this.  
SS#  
MOSI  
MISO  
8 bit CMD  
STATUS  
W0  
W1  
W2  
STATUS  
STATUS  
STATUS  
Figure 6.5 Full Duplex Data Master Write  
When the master is performing a data read, the data and status both need to share the same pin (MISO).  
In this case the master and slave will exchange command and status bytes, followed by the slave sending  
its data. If the Master keeps SS# active the Slave will send a further status byte after the data followed  
by another data byte. This continues until the Master indicates the end of the communications by raising  
SS#. Figure 6.6 is an example of this.  
SS#  
MOSI  
MISO  
8 bit CMD  
STATUS  
R0  
STATUS  
R1  
Figure 6.6 Full Duplex Data Master Read  
43  
Copyright © Future Technology Devices International Limited  
 
 
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