Datasheet 搜索 > USB芯片 > FTDI Chip（飞特帝亚） > FT4222HQ-R 数据手册 > FT4222HQ-R 用户编程技术手册 6/21 页
器件3D模型￥ 11.06
FT4222HQ-R 用户编程技术手册 - FTDI Chip（飞特帝亚）
制造商:
FTDI Chip（飞特帝亚）
分类:
USB芯片
封装:
VQFN-32
Pictures:
3D模型
符号图
焊盘图
引脚图
产品图
页面导航:
引脚图在P5Hot
导航目录
FT4222HQ-R数据手册
Page:
of 21 Go
若手册格式错乱，请下载阅览PDF原文件
Copyright © 2008 Future Technology Devices International Limited 5
Document Reference No.: FT_000078
FTDI Device EEPROM Programming Using a Vinculum VNC1L Application Note AN_105
Version 1.00
Clearance No.:
FTDI# 59
Note: An FTxxxB and FT2232D/C/L device must have an EEPROM connected to the IC. Ensure that when
using an FTxxxB or FT2232D/C/L device that there is an EEPROM connected to the device before
attempting to program the EEPROM using the VNC1L.
2.2 Software Setup
2.2.1 TTL-232R-3V3 Drivers
The TTL-232R-3V3 cable requires its own drivers. These drivers need to be installed on the PC. The
drivers for the cable are available from the Drivers section of the FTDI website. Ensure that the drivers
for the correct PC operating system are used.
Sending firmware commands to the VNC1L requires an application that transmits data down the TTL-
232R-3V3 cable. The FTDI D2XX Direct Driver allows the application software to interface with the
FT232R IC which is integrated within the TTL-232R-3V3 cable. The FTD2XX.DLL provides functions which
allow the firmware commands to communicate with the VNC1L from the PC. An explanation of the
application code that sends the firmware commands to the VNC1L is given in section 4.
2.2.2 VNC1L Firmware
There are a number of VNC1L firmware options. The VDIP1 module uses the VDAP firmware. The
firmware required for the EEPROM commands must be at least VDAP version 3.56 as the EEPROM
commands needed for this application were not available in earlier VDAP revisions.
If it is necessary to upgrade the VDAP software, please refer to the Vinculum Data Sheet for details of
how to do this.
2.2.3 Alternative Application Code
An alternative could be to attach a MCU or FPGA to control the VNC1L. This would not require the TTL-
232R-3V3 cable or PC so there would be no need to install the drivers that are mentioned in Section
2.2.1. Instead the MCU or FPGA would require firmware programmed onto them that would send the
same firmware commands to the VNC1L as explained in the application code in Section 4. The main
advantage of this is that the device would not require a PC to program the EEPROM of the FTxxx devices
making the programmer application portable.
器件 Datasheet 文档搜索
AiEMA 数据库涵盖高达 72,405,303 个元件的数据手册，每天更新 5,000 多个 PDF 文件
