參數(shù)資料
型號: FT232RQ-REEL
廠商: FTDI, Future Technology Devices International Ltd
文件頁數(shù): 26/43頁
文件大?。?/td> 0K
描述: IC USB FS SERIAL UART 32-QFN
產(chǎn)品培訓(xùn)模塊: USB Introduction
USB-UART Interface Solutions
標(biāo)準(zhǔn)包裝: 1
系列: USBmadeEZ-UART
特點(diǎn): USB 至 UART
通道數(shù): 1,UART
FIFO's: 256 字節(jié)
規(guī)程: RS232,RS422,RS485
電源電壓: 3.3 V ~ 5.25 V
帶自動流量控制功能:
帶調(diào)制解調(diào)器控制功能:
帶CMOS:
安裝類型: 表面貼裝
封裝/外殼: 32-VFQFN 裸露焊盤
供應(yīng)商設(shè)備封裝: 32-QFN 裸露焊盤(5x5)
包裝: 標(biāo)準(zhǔn)包裝
產(chǎn)品目錄頁面: 634 (CN2011-ZH PDF)
配用: 768-1023-ND - MOD USB RS232 DEV/EVAL FT232RL
768-1022-ND - MOD USB UART MINI B DEV FT232R
768-1021-ND - MOD USB UART MINI DEV FT232R
768-1019-ND - MOD USB UART DEV FT232R
其它名稱: 768-1008-6
Copyright 2010 Future Technology Devices International Limited
32
Document No.: FT_000053
FT232R USB UART IC Datasheet Version 2.10
Clearance No.: FTDI# 38
7.6 Using the External Oscillator
The FT232R defaults to operating using its own internal oscillator. This requires that the device is
powered with VCC(min)=+4.0V. This supply voltage can be taken from the USB VBUS. Applications which
require using an external oscillator, VCC= +3.3V, must do so in the following order:
1. When device powered for the very first time, it must have VCC > +4.0V. This supply is available
from the USB VBUS supply = +5.0V.
2. The EEPROM must then be programmed to enable external oscillator. This EEPROM modification
cannot be done using the FTDI programming utility, MPROG. The EEPROM can only be re-
configured from a custom application. Please refer to the following applications note on how to do
this:
3. The FT232R can then be powered from VCC=+3.3V and an external oscillator. This can be done
using a link to switch the VCC supply.
The FT232R will fail to operate when the internal oscillator has been disabled, but no external oscillator
has been connected.
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