参数资料
型号: VNC2-64Q1B-TRAY
厂商: FTDI, Future Technology Devices International Ltd
文件页数: 38/88页
文件大小: 0K
描述: IC USB HOST/DEVICE CTRL 64-QFN
应用说明: Vinculum-II IO Cell Description AppNote
Vinculum-II Debug Interface Description AppNote
Vinculum-II IO Mux Explained AppNote
Vinculum-II PWM Example AppNote
Migrating Vinculum Designs AppNote
标准包装: 260
系列: Vinculum-II
控制器类型: USB 2.0 控制器
接口: USB,主机/设备配置,UART,SPI,PWM,闪存 256K,DMA 4CH
电源电压: 1.62 V ~ 1.98 V
电流 - 电源: 25mA
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 64-VFQFN 裸露焊盘
供应商设备封装: 64-QFN(8x8)
包装: 托盘
其它名称: VNC2-64Q1A-TRAY
VNC2-64Q1A-TRAY-ND
43
Copyright 2009-2011 Future Technology Devices International Limited
Datasheet
Vinculum-II Embedded Dual USB Host Controller IC
Version 1.5
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#
MISO
MOSI
8 bit CMD
W0
W1
W2
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#
MISO
MOSI
8 bit CMD
STATUS
R0
STATUS
R1
Figure 6.6 Full Duplex Data Master Read
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