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FT232BL 参数 Datasheet PDF下载

FT232BL图片预览
型号: FT232BL
PDF下载: 下载PDF文件 查看货源
内容描述: [上海格里电子科技有限公司是英国FTDI在中国大陆东南亚地区最大的代理商, FTDI一贯坚持USB make easy思想,为工程师提供最简便的解决方案 上海格里电子科技有限公司是英国FTDI在中国大陆东南亚地区最大的代理商, FTDI一贯坚持USB make easy思想,为工程师提供最简便的解决方案: *VNC2 实现UART、FIFO、IIC、SPI、JTAG转到USB HOST接口,可与其他USB DEVICE设备通讯。FTDI提供简单操作命令,工程师只需调用驱动中相应函数,便可实 现对USB device的控制。 *FT232实现单路USB转到UART,包括TTL,及RS485、RS422、RS232等接口。 *FT245实现单路USB转到FIFO,最高能实现8Mbit/s传输速率。 *FT2232H 实现单USB接口转到2通道芯片,每通道可分别配置成UART、FIFO、IIC、 SPI、JTAG等接口。当配置成2路并行FIFO时,每路最大速率达到10MByte/s;当配 置成单路串行FIFO时,可实现最高25MByte/s速率。 *FT4232H实现单USB接口转4通道芯片,每通道可分别配置成UART、IIC、SPI、 JTAG。主要应用在SOC、CPU进行多串口扩展,典型产品为车载多媒体娱乐设备和各 类自主终端。 与同类功能芯片相比,FTDI产品最大优势在于其高品质与高稳定性,主要表现在低坏片率(小于万分之一)、超长时间通讯不中断、不重启,以及驱动的稳定性和驱动的兼容性。FTDI提供免费驱动,经过微软官方认证,支持window98至最新的windows7所有windows系列操作系统,并支持MAC OS、windows mobile、Linux等平台,对于其他平台的驱动,FTDI可提供底层代码以便工程师开发使用。 联 系 人: 何贵平(Gary) 联系电话: 021-64414999 64389812-809 手 机:13661631714 电子邮件: gary@gelitek.com 公司名称: 上海格里电子科技有限公司 公司网站:www.gelitek.com 地 址:上海市徐汇区蒲汇塘路11号1505-1506室]
分类和应用: 外围集成电路先进先出芯片电子驱动PC电话时钟
文件页数/大小: 25 页 / 542 K
品牌: FTDI [ FUTURE TECHNOLOGY DEVICES INTERNATIONAL LTD. ]
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FT232BL USB UART ( USB - Serial) I.C.
Less External Support Components
As well as eliminating the RCCLK RC network, and
for most applications the need for an external reset
circuit, we have also eliminated the requirement for
a 100K pull-up on EECS to select 6MHz operation.
When the FT232BL is being used without the
configuration EEPROM, EECS, EESK and EEDATA
can now be left n/c. For circuits requiring a long
reset time (where the device is reset externally
using a reset generator I.C., or reset is controlled
by the IO port of a MCU, FPGA or ASIC device) an
external transistor circuit is no longer required as the
1.5k pull-up resistor on USBDP can be wired to the
RSTOUT# pin instead of to 3.3V. Note : RSTOUT#
drives out at 3.3V level, not at 5V VCC level. This is
the preferred configuration for new designs.
Extended EEPROM Support
The previous generation of devices only supported
EEPROM of type 93C46 (64 x 16 bit). The new
devices will also work with EEPROM type 93C56
(128 x 16 bit) and 93C66 (256 x 16 bit). The extra
space is not used by the device, however it is
available for use by other external MCU / logic whilst
the FT232BL is being held in reset.
USB 2.0 (full speed option)
A new EEPROM based option allows the FT232BL
to return a USB 2.0 device descriptor as opposed to
USB 1.1. Note : The device would be a USB 2.0 Full
Speed device (12Mb/s) as opposed to a USB 2.0
High Speed device (480Mb/s).
Multiple Device Support without EEPROM
When no EEPROM (or a blank or invalid
EEPROM) is attached to the device, the FT232BL
no longer gives a serial number as part of its
USB descriptor. This allows multiple devices to
be simultaneously connected to the same PC.
However, we still highly recommend that EEPROM
is used, as without serial numbers a device can
only be identified by which hub port in the USB
tree it is connected to which can change if the end
user re-plugs the device into a different port.
DS232BL Version 1.8
© Future Technology Devices Intl. Ltd. 2005
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