- 您现在的位置：买卖IC网 > PDF目录11820 > FT4232HL-TRAY (FTDI, Future Technology Devices International Ltd)IC USB HS QUAD UART/SYNC 64-LQFP PDF资料下载
参数资料
| 型号： | FT4232HL-TRAY |
| 厂商： | FTDI, Future Technology Devices International Ltd |
| 文件页数： | 11/45页 |
| 文件大小： | 0K |
| 描述： | IC USB HS QUAD UART/SYNC 64-LQFP |
| 标准包装： | 160 |
| 系列： | USBmadeEZ-FIFO |
| 特点： | USB 至 UART 和（或）SPI、I2C、JTAG |
| 通道数： | 4，QUART |
| FIFO's： | 2048 字节 |
| 规程： | RS232，RS422，RS485 |
| 电源电压： | 3 V ~ 3.6 V |
| 带自动流量控制功能： | 是 |
| 带调制解调器控制功能： | 是 |
| 带CMOS： | 是 |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 64-LQFP |
| 供应商设备封装： | 64-LQFP（10x10） |
| 包装： | 托盘 |
| 配用： | 768-1031-ND - MOD USB HS FT4232H EVAL |
| 其它名称： | FT4232HL - TRAY |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页当前第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页
Copyright 2010 Future Technology Devices International Limited
19
Document No.: FT_000060
FT4232H QUAD HIGH SPEED USB TO MULTIPURPOSE UART/MPSSE IC
Datasheet Version 2.2
Clearance No.: FTDI#78
4.3.3 RS485 Configuration
Figure 4.3 illustrates how the FT4232H can be configured as a dual RS485 interface. The FT4232H can
have all 4 channels connected as RS485, but only channel A and channel C are shown for clarity.
Figure 4.3 Dual RS485 Configuration
In this case both channel A and channel C are configured as RS485 operating at TTL levels and a level
converter device (half duplex RS485 transceiver) is used to convert the TTL level signals from the
FT232H to RS485 levels. It has separate enables on both the transmitter and receiver. With RS485, the
transmitter is only enabled when a character is being transmitted from the UART. The TXDEN pins on the
FT4232H are provided for exactly that purpose, and so the transmitter enables are wired to the TXDEN s.
The receiver enable is active low, so it is wired to the PWREN# pin to disable the receiver when in USB
suspend mode.
RS485 is a multi-drop network – i.e. many devices can communicate with each other over a single two
wire cable connection. The RS485 cable requires to be terminated at each end of the cable. Links are
provided to allow the cable to be terminated if the device is physically positioned at either end of the
cable.
In this example the data transmitted by the FT4232H is also received by the device that is transmitting.
This is a common feature of RS485 and requires the application software to remove the transmitted data
from the received data stream. With the FT4232H it is possible to do this entirely in hardware – simply
modify the schematic so that RXD of the FT4232H is the logical OR of the level converter device receiver
output with TXDEN using an HC32 or similar logic gate
相关PDF资料 |
PDF描述 |
|---|---|
| MS27484T12B98PA | CONN PLUG 10POS STRAIGHT W/PINS |
| SC16C654DBIB64,157 | IC QUAD UART 64BYTE 64LQFP |
| VI-B6D-IY | CONVERTER MOD DC/DC 85V 50W |
| SCC2692AE1B44,528 | IC UART DUAL W/FIFO 44PLCC |
| SC16C654BIEC,557 | IC QUAD UART 64BYTE 64LFBGA |
相关代理商/技术参数 |
参数描述 |
|---|---|
| FT4232HMINIMODULE | 制造商:Future Technology Devices International (FTDI Chip) 功能描述:USB to serial/FIFO development module 制造商:Future Technology Devices International (FTDI Chip) 功能描述:USB Hi-Speed FT4232H Evaluation Module |
| FT4232H-MINI-MODULE | 制造商:Future Technology Devices International (FTDI Chip) 功能描述:IC,FT4323H EVALUATION MODULE;USB HI-SPEED |
| FT4232HQ | 制造商:Future Technology Devices International (FTDI Chip) 功能描述:USB Hi-Speed to Quad Channel Serial UART/JTAG/SPI/I2C IC - QFN-64 |
| FT4232HQ_MINI_MODULE | 功能描述:界面开发工具 USB Hi-Speed FT4323H Evaluation Module RoHS:否 制造商:Bourns 产品:Evaluation Boards 类型:RS-485 工具用于评估:ADM3485E 接口类型:RS-485 工作电源电压:3.3 V |
| FT4232HQ-4000 | 制造商:FTDI 制造商全称:FTDI 功能描述:QUAD HIGH SPEED USB TO MULTIPURPOSE UART/MPSSE IC |
发布紧急采购，3分钟左右您将得到回复。