Datasheet > FT245BQ

FT245BQ

更新时间： 2024-02-11 09:34:06

品牌	Logo	应用领域
飞特帝亚 - FTDI		先进先出芯片
页数	文件大小	规格书
24页	557K
描述
USB FIFO ( USB - Parallel ) I.C.

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FT245BQ 技术参数

是否Rohs认证：	符合	生命周期：	Active
包装说明：	,	Reach Compliance Code：	compliant
风险等级：	5.81	Base Number Matches：	1

FT245BQ 数据手册

FT245BQ USB FIFO ( USB - Parallel ) I.C.

1.1 General Description

The FT245BQ provides an easy cost-effective method of transferring data to / from a peripheral and a host P.C. at up

to 8 Million bits (1 Megabyte) per second. Its simple, FIFO-like design makes it easy to interface to any microcontroller

or microprocessor via IO ports.

To send data from the peripheral to the host computer, simply write the byte-wide data into the module when TXE# is

low. If the (384-byte) transmit buffer ﬁlls up or is busy storing the previously written byte, the device keeps TXE# high

in order to stop further data from being written until some of the FIFO data has been transferred over USB to the host.

TXE# goes high after every byte written.

When the host sends data to the peripheral over USB, the device will take RXF# low to let the peripheral know that at

least one byte of data is available. The peripheral can read a data byte every time RXF# goes low. RXF# goes high

after every byte read.

By using FTDI’s virtual COM port drivers, the peripheral looks like a standard COM port to the application software.

Commands to set the baud rate are ignored - the device always transfers data at its fastest rate regardless of the

application’s baud-rate setting. Alternatively, FTDI’s D2XX drivers allow application software to access the device

“directly” through a published DLL based API. Details of the current VCP and D2XX driver can be found on FTDI’s web

site ( http://www.ftdichip.com )

2.0 Enhancements

This section summarises the enhancements of the 2^ndgeneration device compared to its FT8U245AM predecessor.

For further details, consult the device pin-out description and functional descriptions.

•

Integrated Power-On-Reset (POR) Circuit

The device now incorporates an internal POR

function. The existing RESET# pin is maintained

in order to allow external logic to reset the device

where required, however for many applications

this pin can now be either left N/C or hard wired

to VCC. In addition, a new reset output pin

(RSTOUT#) is provided in order to allow the new

POR circuit to provide a stable reset to external

MCU and other devices. RSTOUT# was the TEST

pin on the previous generation of devices.

•

Integrated Level Converter on FIFO interface

and control signals

The previous devices would drive the FIFO and

control signals at 5V CMOS logic levels. The

new device has a separate VCCIO pin allowing

the device to directly interface to 3.3V and other

logic families without the need for external level

converter I.C.’s

•

Power Management control for USB Bus

Powered, high current devices

A new PWREN# signal is provided which can be

used to directly drive a transistor or P-Channel

MOSFET in applications where power switching

of external circuitry is required. A new EEPROM

based option makes the device pull gently down

its FIFO interface lines when the power is shut

off (PWREN# is High). In this mode, any residual

voltage on external circuitry is bled to GND when

•

Integrated RCCLK Circuit

In the previous devices, an external RC circuit

was required to ensure that the oscillator and

clock multiplier PLL frequency was stable prior

to enabling the clock internal to the device. This

circuit is now embedded on-chip – the pin assigned

to this function is now designated as the TEST pin

and should be tied to GND for normal operation.

DS245BQ Version 1.7

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与FT245BQ相关器件

型号	品牌	获取价格	描述	数据表
FT245R	FTDI	获取价格	USB FIFO I.C. Incorporating FTDIChip-ID⑩ Secu
FT245R_10	FTDI	获取价格	USB FIFO IC - Single chip USB to parallel FIFO bidirectional data transfer interface
FT245RL	FTDI	获取价格	Bit Bang Modes for the FT232R and FT245R
FT245RL-2000	FTDI	获取价格	USB FIFO IC - Single chip USB to parallel FIFO bidirectional data transfer interface
FT245RQ	FTDI	获取价格	Bit Bang Modes for the FT232R and FT245R
FT245RQ-6000	FTDI	获取价格	USB FIFO IC - Single chip USB to parallel FIFO bidirectional data transfer interface
FT24C02A	ETC	获取价格	Two-Wire Serial EEPROM
FT24C02A-5DG-B	ETC	获取价格	The FT24C02A is 2048 bits of serial Electrical Erasable and Programmable Read Only Memory,
FT24C02A-5DR-B	ETC	获取价格	The FT24C02A is 2048 bits of serial Electrical Erasable and Programmable Read Only Memory,
FT24C02A-5LG-T	ETC	获取价格	The FT24C02A is 2048 bits of serial Electrical Erasable and Programmable Read Only Memory,

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