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IOBUS4 参数 Datasheet PDF下载

IOBUS4图片预览
型号: IOBUS4
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  
4 Function Description  
VNC2 is the second of FTDIs Vinculum family of Embedded USB host controller integrated circuit devices.  
VNC2 can encapsulate certain USB device classes by handling the USB Host Interface and data transfer  
functions using the in-built EMCU and embedded Flash memory. When interfacing to mass storage  
devices, such as USB Flash drives, VNC2 transparently handles the FAT file structure using a simple to  
implement command set. VNC2 provides a cost effective solution for introducing USB host capability into  
products that previously did not have the hardware resources to do so.  
VNC2 has an associated software development tool suite to allow users to create customised firmware.  
4.1 Key Features  
VNC2 is a programmable SoC device with a powerful embedded microprocessor core and dual USB  
interfaces, large RAM and Flash capacity and the ability to develop and customise firmware using the  
VNC2 Toolchain. VNC2 has an enhanced feature list over and above VNC1L; however the 48 pin LQFP  
package is backward compatible with the VNC1L.  
4.2 Functional Block Descriptions  
The following paragraphs describe each function within VNC2. Please refer to the block diagram shown in  
Figure 2.1  
4.2.1 Embedded CPU  
The processor core is based on FTDIs proprietary 16-bit embedded MCU architecture. The EMCU has a  
Harvard architecture with separate code and data space.  
4.2.2 Flash Module  
VNC2 has 256k bytes (128k x 16-bits) of embedded Flash (E-FLASH) memory. No special programming  
voltages are necessary for programming the on-board E-FLASH as these are provided internally on-chip.  
4.2.3 Flash Programming Module  
The purpose of the flash programmer module is to perform all necessary operations for programming the  
flash, from general usage to first power on sequencing. This block is responsible for handling device  
firmware upgrades which can be accessed by the debugger interface, a USB cable or Flash drive  
interface.  
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