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參數(shù)資料
| 型號： | FT245BQ |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | FT245BQ USB FIFO ( USB - Parallel ) I.C. |
| 中文描述： | FT245BQ USB先進(jìn)先出（USB端口-并行）集成電路 |
| 文件頁數(shù)： | 4/24頁 |
| 文件大?。?/td> | 505K |
| 代理商： | FT245BQ |
DS245BL Version 1.6 Future Technology Devices Intl. Ltd. 2005
Page 4 of 24
FT245BL USB FIFO ( USB - Parallel ) I.C.
The FPGA based hardware can be easily upgraded
or totally changed simply by changing the FPGA
configuration data file. Application notes, software
and development modules for this application area
will be available from FTDI and other 3
rd
party
developers.
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 FT245BL 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 FT245BL is being held in reset.
USB 2.0 ( full speed option )
A new EEPROM based option allows the FT245BL
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 FT245BL
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 USB port.
EEREQ# / EEGNT#
These (FT8U245AM) pins are no longer supported
on the FT245BL device. They have been replaced
with the new SI / WU and PWREN# signals
respectively.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| FT245BQ-REEL | 功能描述:USB 接口集成電路 USB to Parallel FIFO 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 |
| FT245R | 制造商:FTDI 制造商全稱:FTDI 功能描述:USB FIFO I.C. Incorporating FTDIChip-ID⑩ Security Dongle |
| FT245R_10 | 制造商:FTDI 制造商全稱:FTDI 功能描述:USB FIFO IC - Single chip USB to parallel FIFO bidirectional data transfer interface |
| FT245RL | 制造商:Future Technology Devices International 功能描述:USB FIFO IC 28-Pin SSOP 制造商:Future Technology Devices International (FTDI Chip) 功能描述:IC USB TO FIFO SMD SSOP28 245 制造商:Future Technology Devices International (FTDI Chip) 功能描述:IC, USB TO FIFO, SMD, SSOP28, 245 制造商:Future Technology Devices International (FTDI Chip) 功能描述:IC, USB FIFO INTERFACE, SSOP-28; USB Type:USB FIFO; USB Version:2.0; Supply Voltage Min:1.8V; Supply Voltage Max:5.25V; Digital IC Case Style:SSOP; No. of Pins:28; Data Rate:1Mbps; No. of Ports:2; Operating Temperature Min:-40C ;RoHS Compliant: Yes |
| FT245RL-2000 | 制造商:FTDI 制造商全稱:FTDI 功能描述:USB FIFO IC - Single chip USB to parallel FIFO bidirectional data transfer interface |
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