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| 型號： | FT2232HL-TRAY |
| 廠商： | Future Technology Devices International Ltd |
| 元件分類： | 總線控制器 |
| 中文描述： | UNIVERSAL SERIAL BUS CONTROLLER, PQFP64 |
| 封裝： | LEAD FREE, LQFP-64 |
| 文件頁數(shù)： | 30/63頁 |
| 文件大?。?/td> | 1598K |
| 代理商： | FT2232HL-TRAY |
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Copyright 2010 Future Technology Devices International Limited
36
Document No.: FT_000061
FT2232H DUAL HIGH SPEED USB TO MULTIPURPOSE UART/FIFO IC
Datasheet Version 2.10
Clearance No.: FTDI#77
4.8.1
Outgoing Fast Serial Data
To send fast serial data out of the FT2232H, the external device must drive the FSCLK clock. If the
FT2232H has data ready to send, it will drive FSDO output low to indicate the start bit. It will not do this
if it is currently receiving data from the external device. This is illustrated in Figure 4.14.
FSCLK
FSDO
0
D0
D1
D2
D3
D4
D5
D6
D7
SRCE
Start
Bit
Data Bits - LSB first
Source
Bit
Figure 4.14 Fast Opto-Isolated Serial Interface Output Data
Notes :-
1. The first bit output (Start bit) is always 0.
2. FSDO is always sent LSB first.
3. The last serial bit output is the source bit (SRCE). It indicates which channel the data has come
from. A 0 means that it has come from Channel A, a 1 means that it has come from Channel B.
4. If the target device is unable to accept the data when it detects the START bit, it should stop the
FSCLK until it can accept the data.
4.8.2
Incoming Fast Serial Data
An external device is allowed to send data into the FT2232H if FSCTS is high. On receipt of a zero START
bit on FSDI, the FT2232H will drop FSCTS on the next positive clock edge. The data from bits 0 to 7 are
then clocked in (LSB first). The last bit (DEST) determines where the data will be written to. The data can
be sent to either channel A or to channel B. If DEST= 0, the data is sent to channel A, (assuming
channel A is enabled for fast serial mode, otherwise the data is sent to channel B). If DEST= 1 the data
is sent to channel B, (assuming channel B is enabled for fast serial mode, otherwise the data will go to
channel A. (Either channel A, channel B or both channels must be enabled as fast serial mode or the
function is disabled). This is illustrated in Figure 4.15.
FSCLK
FSDI
0
D0
D1
D2
D3
D4
D5
D6
D7
DEST
Start
Bit
Data Bits - LSB first
Destination
Bit
FSCTS
Figure 4.15 Fast Opto-Isolated Serial Interface Input Data
Notes :-
1. The first bit input (Start bit) is always 0.
2. FSDI is always received LSB first.
3. The last received serial bit is the destination bit (DEST).It indicates which channel the data should
go to. A 0 means that it should go to channel A, a 1 means that it should go to channel B.
4. The target device should ensure that CTS is high before it sends data. CTS goes low after data bit
0 (D0) and stays low until the chip can accept more data.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| FT2232HMINIMODULE | 制造商:Future Technology Devices International (FTDI Chip) 功能描述:USB Hi-Speed FT2232H Evaluation Module 制造商:Future Technology Devices International (FTDI Chip) 功能描述:USB to serial/FIFO development module |
| FT2232H-MINI-MODULE | 制造商:Future Technology Devices International (FTDI Chip) 功能描述:IC,EVALUATION MODULE;FT2232H;USB HI-SPEED |
| FT2232HQ | 制造商:Future Technology Devices International (FTDI Chip) 功能描述:USB Hi-Speed to Dual Channel Serial UART/FIFO/JTAG/SPI/I2C IC - QFN-64 |
| FT2232HQ_MINI_ MODULE | 功能描述:界面開發(fā)工具 USB Hi-Speed FT2232H Evaluation Module RoHS:否 制造商:Bourns 產(chǎn)品:Evaluation Boards 類型:RS-485 工具用于評估:ADM3485E 接口類型:RS-485 工作電源電壓:3.3 V |
| FT2232HQ-4000 | 制造商:FTDI 制造商全稱:FTDI 功能描述:DUAL HIGH SPEED USB TO MULTIPURPOSE UART/FIFO IC |
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