參數(shù)資料
型號(hào)： FT232RL-REEL
廠商： FTDI, Future Technology Devices International Ltd
文件頁(yè)數(shù)： 26/43頁(yè)
文件大?。?/td> 0K
描述： IC USB FS SERIAL UART 28-SSOP
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(dòng)流量控制功能： 是
帶調(diào)制解調(diào)器控制功能： 是
帶CMOS： 是
安裝類(lèi)型： 表面貼裝
封裝/外殼： 28-SSOP（0.209"，5.30mm 寬）
供應(yīng)商設(shè)備封裝： 28-SSOP
包裝： 標(biāo)準(zhǔn)包裝
產(chǎn)品目錄頁(yè)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(chēng)： 768-1007-6
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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