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參數(shù)資料
| 型號(hào)： | FT2232C |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | FT2232C Dual USB UART / FIFO I.C. |
| 中文描述： | FT2232C雙USB的UART / FIFO的集成電路 |
| 文件頁數(shù)： | 27/51頁 |
| 文件大?。?/td> | 907K |
| 代理商： | FT2232C |
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DS2232C Version 1.4
Future Technology Devices International Ltd. 2005 Page 27 of 54
FT2232C Dual USB UART / FIFO I.C.
Figure 13 is a FT2232C design example which effectively combines the circuits shown in Figures 13 and 14 to give a
USB bus powered design with power switching and 3.3V logic drive level on both channels. Once again a P-Channel
Power MOSFET and soft start circuit are used to control the power to external logic devices. A 3.3V LDO regulator
which is supplied by the USB bus is used to provide the 3.3V supply for the VCCIO pins, as well as the external logic.
If the SI/WU pins are not being used they should be pulled up to 3.3V.
Alternatively, a dedicated power switch I.C. with inbuilt “soft-start” can be used instead of a MOSFET. A suitable
www.micrel.com) MIC2025-2BM or equivalent.
Please note the following points in connection with power controlled designs –
a) The logic to be controlled must have its own reset circuitry so that it will automatically reset itself when power is re-
applied on coming out of suspend.
b) Set the Pull-down on Suspend option in the FT2232C’s EEPROM.
c) For USB high-power bus powered device (one that consumes greater than 100 mA, and up to 500 mA of current
from the USB bus), the power consumption of the device should be set in the max power field in the EEPROM.
A high-power bus powered device must use this descriptor in the EEPROM to inform the system of its power
requirements.
d) For 3.3V power controlled circuits the VCCIO pins must not be powered down with the external circuitry. Either
connect the power switch between the output of the 3.3V regulator and the external 3.3V logic, or if appropriate
power the VCCIO pin from the 3V3OUT pin of the FT2232C.
Figure 13 - Bus Powered Circuit with Power Control and 3.3V Logic Drive / IO Supply
Voltage
USB "B"
Connector
Ferrite
Bead
470R
0.1uF
VCC5V
27R
27R
USB DM
8
FT2232
USB DP
7
V
C
C
V
C
C
V
C
C
I
O
B
3
42
31
1
2
3
4
33nF
3V3OUT
6
A
V
C
C
46
10nF
PWREN#
41
0.1uF
Switched 3.3V Power
to External Logic
P-Channel Power
MOSFET
s
g
d
0.1uF
Soft Start
Circuit
1K
V
C
C
I
O
A
14
RSTOUT#
1.5K
RESET#
VCC5V
Decoupling Capacitors
10uF
VCC5V
0.1uF
0.1uF
+
4
5
3.3V LDO
Regulator
IN
OUT
GND
0.1uF
SI/WUB
SI/WUA
VCC3V3
VCC3V3
VCC3V3
26
10
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| FT2232C_04 | 制造商:FTDI 制造商全稱:FTDI 功能描述:Dual USB UART / FIFO I.C. |
| FT2232D | 制造商:Future Technology Devices International 功能描述:UART 2-CH 3.3V/5V 48-Pin LQFP 制造商:Future Technology Devices International 功能描述:UART 2-CH 3.3V/5V 48-Pin LQFP Bulk 制造商:Future Technology Devices International (FTDI Chip) 功能描述:USB Full Speed to Dual Channel Serial UART/FIFO/JTAG/SPI/I2C IC - LQFP-48 |
| FT2232D/TR | 制造商:Future Technology Devices International (FTDI Chip) 功能描述:USB-UART/FIFO SMD 2232 LQFP48 制造商:Future Technology Devices International (FTDI Chip) 功能描述:USB-UART/FIFO, SMD, 2232, LQFP48 制造商:Future Technology Devices International (FTDI Chip) 功能描述:USB-UART/FIFO, SMD, 2232, LQFP48; USB Type:FIFO; USB Version:2.0; Supply Voltage Min:3V; Supply Voltage Max:5.25V; Digital IC Case Style:LQFP; No. of Pins:48; Data Rate:12Mbps; No. of Ports:2; Operating Temperature Min:-40C ;RoHS Compliant: Yes |
| FT2232D-REEL | 功能描述:USB 接口集成電路 USB to Dual UART/ FIFO/SPI/JTAG/I2C 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 |
| FT2232D-TRAY | 制造商:Future Technology Devices International (FTDI Chip) 功能描述:DUAL USB TO SERIAL UART/FIFO IC |
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