参数资料
型号: FT2232D-REEL
厂商: FTDI, Future Technology Devices International Ltd
文件页数: 47/61页
文件大小: 0K
描述: IC USB FS DUAL UART/FIFO 48-LQFP
产品培训模块: USB Introduction
标准包装: 1
系列: USBmadeEZ-FIFO,FT-X,X-Chip
特点: USB 至 UART 和(或)FIFO、SPI、I2C、JTAG
通道数: 2,DUART
FIFO's: 384 字节
规程: RS232,RS422,RS485
电源电压: 4.35 V ~ 5.25 V
带并行端口:
带自动流量控制功能:
带调制解调器控制功能:
带CMOS:
安装类型: 表面贴装
封装/外壳: 48-LQFP
供应商设备封装: 48-LQFP
包装: 标准包装
产品目录页面: 634 (CN2011-ZH PDF)
配用: 768-1030-ND - MOD USB HS FT2232H EVAL
813-1009-ND - MODULE USB-TO-FPGA TOOL W/MANUAL
813-1001-ND - MODULE USB ADAPTR FOR FT2232D LP
813-1000-ND - MODULE USB ADAPTER FOR FT2232D
其它名称: 768-1010-6
Copyright 2010 Future Technology Devices International Limited
51
Document No.: FT_000173
FT2232D DUAL USB TO SERIAL UART
/FIFO IC Datasheet
Version 2.05
Clearance No.: FTDI# 127
Figure 8.17 Fast Opto-Isolated Serial Interface Example
In the example shown in figure 8.18 two Agilent HCPL-2430 (see the semiconductor section at
www.agilent.com) high speed opto-couplers are used to optically isolate an external device which
interfaced to USB using the FT2232D. In this example VCC5V is the supply for the FT2232D (bus or self
powered), and VCCE is the supply to the external device.
Care must be taken with the voltage used to power the photoLEDs. It should be the same supply that
the I/Os are driving to, or the LEDs may be permanently on. Limiting resistors should be fitted in the
lines that drive the diodes. The outputs of the opto-couplers are open-collector and so need a pullup
resistor.
Testing
Fast serial mode has been tested using an Scenix (Ubicom), SX28 microcontroller (see
www.ubicom.com) which was configured in loopback mode. This was done both with, and without HP
HCPL-2430 opto-isolators in place. The isolators add a considerable delay to the turnaround time seen by
the micro. This was close to 100 nS with the high speed HCPL-2430 device. This is the combined delay of
the clock signal from the microcontroller going through an opto-coupler to the chip, and the data from
the FT2232D chip going through the other opto-coupler back to the microcontroller.
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