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VNC2 参数 Datasheet PDF下载

VNC2图片预览
型号: VNC2
PDF下载: 下载PDF文件 查看货源
内容描述: [上海格里电子科技有限公司是英国FTDI在中国大陆东南亚地区最大的代理商, FTDI一贯坚持USB make easy思想,为工程师提供最简便的解决方案 上海格里电子科技有限公司是英国FTDI在中国大陆东南亚地区最大的代理商, FTDI一贯坚持USB make easy思想,为工程师提供最简便的解决方案: *VNC2 实现UART、FIFO、IIC、SPI、JTAG转到USB HOST接口,可与其他USB DEVICE设备通讯。FTDI提供简单操作命令,工程师只需调用驱动中相应函数,便可实 现对USB device的控制。 *FT232实现单路USB转到UART,包括TTL,及RS485、RS422、RS232等接口。 *FT245实现单路USB转到FIFO,最高能实现8Mbit/s传输速率。 *FT2232H 实现单USB接口转到2通道芯片,每通道可分别配置成UART、FIFO、IIC、 SPI、JTAG等接口。当配置成2路并行FIFO时,每路最大速率达到10MByte/s;当配 置成单路串行FIFO时,可实现最高25MByte/s速率。 *FT4232H实现单USB接口转4通道芯片,每通道可分别配置成UART、IIC、SPI、 JTAG。主要应用在SOC、CPU进行多串口扩展,典型产品为车载多媒体娱乐设备和各 类自主终端。 与同类功能芯片相比,FTDI产品最大优势在于其高品质与高稳定性,主要表现在低坏片率(小于万分之一)、超长时间通讯不中断、不重启,以及驱动的稳定性和驱动的兼容性。FTDI提供免费驱动,经过微软官方认证,支持window98至最新的windows7所有windows系列操作系统,并支持MAC OS、windows mobile、Linux等平台,对于其他平台的驱动,FTDI可提供底层代码以便工程师开发使用。 联 系 人: 何贵平(Gary) 联系电话: 021-64414999 64389812-809 手 机:13661631714 电子邮件: gary@gelitek.com 公司名称: 上海格里电子科技有限公司 公司网站:www.gelitek.com 地 址:上海市徐汇区蒲汇塘路11号1505-1506室]
分类和应用: 先进先出芯片电子驱动电话
文件页数/大小: 89 页 / 1885 K
品牌: FTDI [ FUTURE TECHNOLOGY DEVICES INTERNATIONAL LTD. ]
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Document No.: FT_000138
VINCULUM-II EMBEDDED DUAL USB HOST CONTROLLER IC Datasheet
Version -
1.0
Clearance No.: FTDI#
143
7
USB Interfaces
VNC2 has two USB 1.1 and USB 2.0 compliant interfaces available either as a USB host or slave device
capable of supporting 1.5Mb/s (Low Speed) and 12Mb/s (full Speed) transactions. The USB specification
defines 4 transfer types that are all supported by VNC2:
Interrupt transfer: Used for legacy devices where the device is periodically polled to see if the
device has data to transfer e.g. Mouse, Keyboard.
Bulk Transfer: Used for transferring large blocks of data that have no periodic or transfer rate
requirement e.g. USB to RS232 (FT232R device), memory sticks.
Isochronous Transfer: Used for transferring data that requires a constant delivery rate e.g.
web cam, wireless modem.
Control Transfer: Used to transfer specific requests to all types USB devices (most commonly
used during device configuration).
USB 2.0 - 480Mb/s (High Speed) transactions shall not be supported as the power requirements are
deemed excessive for VNC2 target applications. VNC2 configured to Full speed is supported.
VNC2 has two main USB modes of operation: host mode or client (or Slave) mode. As a client, VNC2 is
able to connect to a PC and act like a USB device. At the same time as being a client the second USB
interface is also able to act as a host and connect to a second USB device using two separate ports i.e.
Port 0 – Host Port 1- Client. Each USB interface can be either a host or a client not both at the same
time. The following diagrams in figure 7.1 give examples of possible modes of operation:
Port
0
USB Device
Port
0
USB Host
VNC2
VNC2
Port
1
BOMS Flash Disk
Port
1
Port 0 and 1 in Host mode
Port 0 in Slave mode
Port
0
Port
0
USB Host
VNC2
VNC2
USB Host
Port
1
BOMS Flash Disk
Port
1
USB Host
Port 0 in Slave mode and Port 1 in Host mode
Port 0 and 1 in Slave mode (Null Modem type application)
Figure 7-1 USB Modes
Copyright © 2010 Future Technology Devices International Limited
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