- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄1922 > FT4232HQ-REEL (FTDI, Future Technology Devices International Ltd)IC USB HS QUAD UART/SYNC 64-QFN PDF資料下載
參數(shù)資料
| 型號： | FT4232HQ-REEL |
| 廠商： | FTDI, Future Technology Devices International Ltd |
| 文件頁數(shù)： | 15/45頁 |
| 文件大小： | 0K |
| 描述： | IC USB HS QUAD UART/SYNC 64-QFN |
| 標準包裝： | 1 |
| 系列： | USBmadeEZ-FIFO |
| 特點： | USB 至 UART 和（或）SPI、I2C、JTAG |
| 通道數(shù)： | 4，QUART |
| FIFO's： | 2048 字節(jié) |
| 規(guī)程： | RS232，RS422，RS485 |
| 電源電壓： | 3 V ~ 3.6 V |
| 帶自動流量控制功能： | 是 |
| 帶調(diào)制解調(diào)器控制功能： | 是 |
| 帶CMOS： | 是 |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 64-VFQFN 裸露焊盤 |
| 供應商設備封裝： | 64-QFN 裸露焊盤（9x9） |
| 包裝： | 標準包裝 |
| 產(chǎn)品目錄頁面： | 634 (CN2011-ZH PDF) |
| 配用： | 768-1031-ND - MOD USB HS FT4232H EVAL |
| 其它名稱： | 768-1027-6 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁當前第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁
Copyright 2010 Future Technology Devices International Limited
22
Document No.: FT_000060
FT4232H QUAD HIGH SPEED USB TO MULTIPURPOSE UART/MPSSE IC
Datasheet Version 2.2
Clearance No.: FTDI#78
4.5 Synchronous and Asynchronous Bit-Bang Interface Mode
Description
The FT4232H channel A,B,C or channel D can be configured as a bit-bang interface. There are two types
of bit-bang modes: synchronous and asynchronous.
Asynchronous Bit-Bang Mode
Asynchronous Bit-Bang mode is the same as BM-style Bit-Bang mode. On any channel configured in
asynchronous bit-bang mode. Data written to the device in the normal manner will be self clocked onto
the parallel I/O data pins (those which have been configured as outputs). Each I/O pin can be
independently set as an input or an output. The rate that the data is clocked out at is controlled by the
baud rate generator.
For the data to change there has to be new data written, and the baud rate clock has to tick. If no new
data is written to the channel, the pins will hold the last value written.
Synchronous Bit-Bang Mode
The synchronous Bit-Bang mode will only update the output parallel I/O port pins whenever
data is sent from the USB interface to the parallel interface. When this is done, data is read from the USB
Rx FIFO buffer and written out on the pins. Data can only be received from the parallel pins (to the USB
Tx FIFO interface) when the parallel interface has been written to.
With Synchronous Bit-Bang mode, data will only be sent out by the FT4232H if there is space in the
FT4232H USB TXFIFO for data to be read from the parallel interface pins. This Synchronous Bit-Bang
mode will read the data bus parallel I/O pins first, before it transmits data from the USB RxFIFO. It is
therefore 1 byte behind the output, and so to read the inputs for the byte that you have just sent,
another byte must be sent.
For example :-
(1) Pins start at 0xFF
Send 0x55,0xAA
Pins go to 0x55 and then to 0xAA
Data read = 0xFF,0x55
(2) Pins start at 0xFF
Send 0x55,0xAA,0xAA
(repeat the last byte sent)
Pins go to 0x55 and then to 0xAA
Data read = 0xFF,0x55,0xAA
Synchronous Bit-Bang Mode differs from Asynchronous Bit-Bang mode in that the device parallel output
is only read when the parallel output is written to by the USB interface. This makes it easier for the
controlling program to measure the response to a USB output stimulus as the data returned to the USB
interface is synchronous to the output data.
Asynchronous Bit-Bang mode is enabled using Set Bit Bang Mode driver command. A hex value of 1 will
enable Asynchronous Bit-Bang mode.
Synchronous Bit-Bang mode is enabled using Set Bit Bang Mode driver command. A hex value of 4 will
enable Synchronous Bit-Bang mode.
See application note AN2232-02, “Bit Mode Functions for the FT2232” for more details and
examples of using the bit-bang modes.
An example of the synchronous bi-bang mode timing is shown in Figure 4.7 and Table 4.2.
相關PDF資料 |
PDF描述 |
|---|---|
| FUSB1500MHX | IC USB 2.0 TRANSCEIVER 16-MLP |
| FUSB2805MLX | TXRX USB2.0 HS OTG ULPI 32MLP |
| FXLA2203UMX | TRANSLATOR LEVEL DUAL 24UMLP |
| GAL16V8D-15LJN | SPLD 62.5MHZ EECMOS 20 PLCC |
| GAL18V10B-20LP | IC GAL 10OUT MACROCELL 7.5NS 20 |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| FT4232HQ-TRAY | 功能描述:USB 接口集成電路 USB HS to Quad UART/ SPI/JTAG/I2C QFN-64 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 安裝風格:SMD/SMT 封裝 / 箱體:WLCSP-20 |
| FT-42-3T | 制造商:PANASONIC INDUSTRIAL AUTOMATION SALES 功能描述:FIBER M4 THRUBEAM R4 BEND RADIUS 制造商:Panasonic Electric Works 功能描述:Fiber, M4, Thru-beam, 3M Free cut, R4 Bend radius |
| FT-42S | 制造商:PANASONIC INDUSTRIAL AUTOMATION SALES 功能描述:FIBER M4 THREADED THRUBEAM R4 制造商:Panasonic Electric Works 功能描述:SENSOR, FIBRE OPTIC, THRUBEAM, 1.13M; Fiber Optic Sensor Type:Thrubeam; Sensing Range Max:1.13m; Sensing Range:0m to 1.13m |
| FT-42W | 制造商:PANASONIC INDUSTRIAL AUTOMATION SALES 功能描述:FIBER M4 THREADED THRUBEAM R1 制造商:Panasonic Electric Works 功能描述:SENSOR, FIBRE OPTIC, THRUBEAM, 800MM; Fiber Optic Sensor Type:Thrubeam; Sensing Range Max:800mm; Sensing Range:0mm to 800mm |
| FT-43 | 制造商:PANASONIC ELECTRIC WORKS ACSD 功能描述:Sensor, M4 Threaded Thru Beam, R4, 2m Cable 制造商:Panasonic Electric Works 功能描述:SENSOR FIBRE OPTIC THRUBEAM 1.4M 制造商:Panasonic Electric Works 功能描述:SENSOR, FIBRE OPTIC, THRUBEAM, 1.4M 制造商:Panasonic Electric Works 功能描述:SENSOR, FIBRE OPTIC, THRUBEAM, 1.4M; Fiber Optic Sensor Type:Thrubeam; Sensing Range Max:1.4m; Sensing Range:0m to 1.4m |
發(fā)布緊急采購，3分鐘左右您將得到回復。