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参数资料
| 型号： | USB NMC-2.5M |
| 厂商： | FTDI, Future Technology Devices International Ltd |
| 文件页数： | 6/7页 |
| 文件大小： | 0K |
| 描述： | CABLE USB NULL MODEM CABLE 2.5M |
| 产品目录绘图： | USB-NMC-2.5M |
| 标准包装： | 10 |
| 系列： | USBmadeEZ-UART |
| 使用： | USB 虚拟调制解调器 |
| 转换源（适配器端）： | USB - A，插头 |
| 转换到（适配器端）： | 线缆，6 条电线引线 |
| 长度： | 8.20'（2.50m） |
| 屏蔽： | 屏蔽 |
| 其它名称： | 768-1076 USB-NMC-2.5M |
Document Reference No.: FT_000056
USB NMC-2.5m USB To USB Null Modem Cable Datasheet Version 1.00
Clearance No.: FTDI# 40
Appendix A - FT232R EEPROM Configuration
Each end of the NMC cable is controlled by the FTDI FT232R IC. This FT232R device contains an EEPROM
which contains the USB configuration descriptors for that device. When the cable is plugged into a PC or a
USB reset is performed, the PC will read these descriptors. The default values stored into the internal
EEPROM are defined in Error! Reference source not found..
Parameter
USB Vendor ID (VID)
USB Product UD (PID)
Serial Number Enabled?
Serial Number
Pull down I/O Pins in USB Suspend
Manufacturer Name
Product Description
Max Bus Power Current
Power Source
Device Type
USB Version
Remote Wake Up
High Current I/Os
Load VCP Driver
Invert TXD
Invert RXD
Invert RTS#
Invert CTS#
Value
0403h
6001h
Yes
See Note
Disabled
FTDI
USB Null Modem Cable
90mA
Bus Powered
FT232R
0200
Disabled
Disabled
Disabled
Disabled
Disabled
Disabled
Disabled
Notes
FTDI default VID (hex)
FTDI default PID (hex)
A unique serial number is generated and programmed into the
EEPROM during device final test.
Enabling this option will make the device pull down on the UART
interface lines when the power is shut off (PWREN# is high).
Returns USB 2.0 device description to the host.
Note: The device is be a USB 2.0 Full Speed device (12Mb/s) as
opposed to a USB 2.0 High Speed device (480Mb/s).
Taking RI# low will wake up the USB host controller from suspend.
Enables the high drive level on the UART and CBUS I/O pins.
Makes the device load the VCP driver interface for the device.
Signal on this pin becomes TXD# if enable.
Signal on this pin becomes RXD# if enable.
Signal on this pin becomes RTS if enable.
Signal on this pin becomes CTS if enable.
Table 3.1 Default Internal EEPROM Configuration
The internal EEPROM in the FT232R can be re-programmed over USB using the utility program MPROG.
MPROG can be downloaded from the www.ftdichip.com. Version 2.8a or later is required for the FT232R
chip. Users who do not have their own USB Vendor ID but who would like to use a unique Product ID in their
design can apply to FTDI for a free block of unique PIDs. Contact FTDI support for this service.
Copyright ? Future Technology Devices International Limited
5
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