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参数资料
| 型号： | FT2232D-REEL |
| 厂商： | FTDI, Future Technology Devices International Ltd |
| 文件页数： | 15/61页 |
| 文件大小： | 0K |
| 描述： | IC USB FS DUAL UART/FIFO 48-LQFP |
| 产品培训模块： | USB Introduction |
| 标准包装： | 1 |
| 系列： | USBmadeEZ-FIFO，FT-X，X-Chip |
| 特点： | USB 至 UART 和（或）FIFO、SPI、I2C、JTAG |
| 通道数： | 2，DUART |
| FIFO's： | 384 字节 |
| 规程： | RS232，RS422，RS485 |
| 电源电压： | 4.35 V ~ 5.25 V |
| 带并行端口： | 是 |
| 带自动流量控制功能： | 是 |
| 带调制解调器控制功能： | 是 |
| 带CMOS： | 是 |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 48-LQFP |
| 供应商设备封装： | 48-LQFP |
| 包装： | 标准包装 |
| 产品目录页面： | 634 (CN2011-ZH PDF) |
| 配用： | 768-1030-ND - MOD USB HS FT2232H EVAL 813-1009-ND - MODULE USB-TO-FPGA TOOL W/MANUAL 813-1001-ND - MODULE USB ADAPTR FOR FT2232D LP 813-1000-ND - MODULE USB ADAPTER FOR FT2232D |
| 其它名称： | 768-1010-6 |
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Copyright 2010 Future Technology Devices International Limited
22
Document No.: FT_000173
FT2232D DUAL USB TO SERIAL UART
/FIFO IC Datasheet
Version 2.05
Clearance No.: FTDI# 127
6.1 USB Self Powered Configuration
Figure 6.2 Self Powered Configuration
Figure 6.2 illustrates the FT2232D in a typical USB self powered configuration. A USB Self
Powered device gets its power from its own POWER SUPPLY and does not draw current from the
USB bus. The basic rules for USB Self power devices are as follows –
a) A Self-Powered device should not force current down the USB bus when the USB
Host or Hub Controller is powered down.
b)A Self Powered Device can take as much current as it likes during normal operation
and USB suspend as it has its own POWER SUPPLY.
c)A Self Powered Device can be used with any USB Host and both Bus and Self
Powered USB Hubs.
The USB power descriptor option in the EEPROM should be programmed to a value of zero (self powered).
To meet requirement a) the 1.5 K pull-up resistors on USBDP is connected to RSTOUT# as per the bus-
power circuit. However, the USB Bus Power is used to control the RESET# Pin of the FT2232D device. When
the USB Host or Hub is powered up RSTOUT# will pull the 1.5K resistor on USBDP to 3.3V, thus identifying
the device as a full speed device to USB. When the USB Host or Hub power is off, RESET# will go low and
the device will be held in reset. As RESET# is low, RSTOUT# will also be low, so no current will be forced
down USBDP via the 1.5K pull-up resistor when the host or hub is powered down. Failure to do this may
cause some USB host or hub controllers to power up erratically. Note: When the FT2232D is in reset, the
I/O interface pins all go tri-state. These pins have internal 200K pull-up resistors to VCCIO, so they will
gently pull high unless driven by some external logic.
相关PDF资料 |
PDF描述 |
|---|---|
| FT2232HQ-REEL | IC USB HS DUAL UART/FIFO 64-QFN |
| FT232BL-REEL | IC USB FS SERIAL UART 32-LQFP |
| FT232HL-REEL | IC HS USB TO UART/FIFO 48LQFP |
| FT232RL-REEL | IC USB FS SERIAL UART 28-SSOP |
| FT245BL-REEL | IC USB FS PARALLEL FIFO 32-LQFP |
相关代理商/技术参数 |
参数描述 |
|---|---|
| FT2232D-TRAY | 制造商:Future Technology Devices International (FTDI Chip) 功能描述:DUAL USB TO SERIAL UART/FIFO IC |
| FT2232H | 制造商:FTDI 制造商全称:FTDI 功能描述:DUAL HIGH SPEED USB TO MULTIPURPOSE UART |
| FT2232H MINI MODULE | 功能描述:界面开发工具 USB Hi-Speed FT2232H Evaluation Module RoHS:否 制造商:Bourns 产品:Evaluation Boards 类型:RS-485 工具用于评估:ADM3485E 接口类型:RS-485 工作电源电压:3.3 V |
| FT2232H_10 | 制造商:FTDI 制造商全称:FTDI 功能描述:DUAL HIGH SPEED USB TO MULTIPURPOSE UART/FIFO IC |
| FT2232H_12 | 制造商:FTDI 制造商全称:FTDI 功能描述:Dual High Speed USB to Multipurpose UART/FIFO IC |
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