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參數(shù)資料
| 型號： | FT232RQ |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | Incorporating Clock Generator Output and FTDIChip-ID Security Dongle |
| 中文描述： | 納入時鐘發(fā)生器輸出和FTDIChip標(biāo)識安全適配器 |
| 文件頁數(shù)： | 19/29頁 |
| 文件大小： | 471K |
| 代理商： | FT232RQ |
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FT232R USB UART I.C. Datasheet Version 1.04
Future Technology Devices International Ltd. 2005
Page 19
7. Device Configurations
Please note that pin numbers on the FT232R chip in this section have deliberately been left out as they vary between
the FT232RL and FT232RQ versions of the device. All of these configurations apply to both package options for the
FT232R device. Please refer to
Section 4
for the package option pin-out and signal descriptions.
7.1 Bus Powered Configuration
Figure 11 - Bus Powered Configuration
Figure 11 illustrates the FT232R in a typical USB bus powered design configuration. A USB Bus Powered device gets
its power from the USB bus. Basic rules for USB Bus power devices are as follows –
i)
On plug-in to USB, the device must draw no more than 100mA.
ii) On USB Suspend the device must draw no more than 500μA.
iii) A Bus Powered High Power USB Device (one that draws more than 100mA) should use one of the CBUS pins
configured as PWREN# and use it to keep the current below 100mA on plug-in and 500μA on USB suspend.
iv) A device that consumes more than 100mA can not be plugged into a USB Bus Powered Hub.
v) No device can draw more that 500mA from the USB Bus.
The power descriptor in the internal EEPROM should be programmed to match the current draw of the device.
A Ferrite Bead is connected in series with USB power to prevent noise from the device and associated circuitry (EMI)
being radiated down the USB cable to the Host. The value of the Ferrite Bead depends on the total current required by
the circuit – a suitable range of Ferrite Beads is available from Steward (
www.steward.com
) for example Steward Part
# MI0805K400R-00.
FT232R
A
G
N
D
G
N
D
G
N
D
G
N
D
T
E
S
T
100nF
3V3OUT
VCCIO
NC
RESET#
NC
+
100nF
10nF
Vcc
TXD
RXD
RTS#
CTS#
DTR#
DSR#
DCD#
RI#
CBUS0
CBUS3
CBUS2
CBUS1
USBDP
USBDM
VCC
1
2
3
4
5
OSCI
OSCO
CBUS4
Ferrite
Bead
+
4.7uF
SHIELD
GND
GND
GND
GND
Vcc
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| FT232RQ-6000 | 制造商:FTDI 制造商全稱:FTDI 功能描述:USB UART IC - Single chip USB to asynchronous serial data transfer interface |
| FT232RQ-REEL | 功能描述:USB 接口集成電路 USB to Serial UART Enhanced IC QFN-32 RoHS:否 制造商:Cypress Semiconductor 產(chǎn)品:USB 2.0 數(shù)據(jù)速率: 接口類型:SPI 工作電源電壓:3.15 V to 3.45 V 工作電源電流: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WLCSP-20 |
| FT232RQ-TRAY | 制造商:Future Technology Devices International (FTDI Chip) 功能描述: |
| FT-23-43 | 制造商:Amidon 功能描述:Bulk |
| FT234XD-R | 制造商:Future Technology Devices International (FTDI Chip) 功能描述:IC USB SERIAL BASIC UART 12DFN 制造商:Future Technology Devices International (FTDI Chip) 功能描述:USB to Serial UART Interface |
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