參數(shù)資料
型號: FT2232HQ-TRAY
廠商: Future Technology Devices International Ltd
元件分類: 總線控制器
中文描述: UNIVERSAL SERIAL BUS CONTROLLER, PQCC64
封裝: LEAD FREE, QFN-64
文件頁數(shù): 31/63頁
文件大?。?/td> 1598K
代理商: FT2232HQ-TRAY
Copyright 2010 Future Technology Devices International Limited
37
Document No.: FT_000061
FT2232H DUAL HIGH SPEED USB TO MULTIPURPOSE UART/FIFO IC
Datasheet Version 2.10
Clearance No.: FTDI#77
4.8.3 Fast Opto-Isolated Serial Data Interface Example
The following example,Figure 4.16 , shows two Agilent HCPL-2430 (see the semiconductor section at
www.agilent.com) high speed opto-couplers used to optically isolate an external device which
interfaced to USB using the FT2232H. In this example VCC5V is the USB VBUS supply and VCCE is the
supply to the external device.
Care must be taken with the voltage used to power the photo-LEDs. It must be the same voltage as that
the FT2232H 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 require a pull-
up resistor.
FT2232H
FSDI
FSCLK
FSDO
FSCTS
VCC5V
HCPL-2430
VCCE
HCPL-2430
1K
470R
VCCE
Cable
DI
CLK
DO
CTS
VCC5V
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
Figure 4.16 Fast Opto-Isolated Serial Interface Example
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