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| 型号： | FT4232H MINI MODULE |
| 厂商： | FTDI, Future Technology Devices International Ltd |
| 文件页数： | 11/45页 |
| 文件大小： | 0K |
| 描述： | MOD USB HS FT4232H EVAL |
| 产品变化通告： | Part Number Change Jan 2011 |
| 产品目录绘图： | FT(22, 42)32HQ MINI MOD |
| 标准包装： | 5 |
| 主要目的： | 接口，USB 2.0 至 UART（RS232）电桥 |
| 嵌入式： | 是，ASIC |
| 已用 IC / 零件： | FT4232H |
| 主要属性： | 高速，300 波特 ~ 12 M 波特，安全识别号 |
| 次要属性： | 仿真 JTAG、SPI、I2C、位响应或其它同步串行 |
| 已供物品： | 板 |
| 产品目录页面： | 633 (CN2011-ZH PDF) |
| 相关产品： | FT4232HQ - TRAY-ND - IC USB HS QUAD UART/SYNC 64-QFN FT4232HL - TRAY-ND - IC USB HS QUAD UART/SYNC 64-LQFP 768-1027-6-ND - IC USB HS QUAD UART/SYNC 64-QFN 768-1026-6-ND - IC USB HS QUAD UART/SYNC 64-LQFP 768-1027-1-ND - IC USB HS QUAD UART/SYNC 64-QFN 768-1026-1-ND - IC USB HS QUAD UART/SYNC 64-LQFP 768-1027-2-ND - IC USB HS QUAD UART/SYNC 64-QFN 768-1026-2-ND - IC USB HS QUAD UART/SYNC 64-LQFP |
| 其它名称： | 768-1031 FT4232HQ_MINI MOD |
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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
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相关代理商/技术参数 |
参数描述 |
|---|---|
| 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 |
| FT4232HQ-MINI-MODULE | 制造商:Future Technology Devices International (FTDI Chip) 功能描述:MODULE USB 4 PORT FT4232H BASED 制造商:Future Technology Devices International (FTDI Chip) 功能描述:MOD, USB TO SERIAL / FIFO, FT4232H 制造商:Future Technology Devices International (FTDI Chip) 功能描述:MOD, CONV, USB TO SERIAL / FIFO, 4 PORT, FT4232H; ;ROHS COMPLIANT: YES |
| FT4232HQ-R | 制造商:Future Technology Devices International (FTDI Chip) 功能描述:USB-UART/MPSSE 2232 QUAD 64QFN 制造商:Future Technology Devices International (FTDI Chip) 功能描述:USB-UART/MPSSE, 2232, QUAD, 64QFN 制造商:Future Technology Devices International (FTDI Chip) 功能描述:USB-UART/MPSSE, 2232, QUAD, 64QFN; USB Type:Host Controller; USB Version:2.0; Supply Voltage Min:1.62V; Supply Voltage Max:1.98V; Digital IC Case Style:LQFP; No. of Pins:64; Data Rate:480Mbps; No. of Ports:4 ;RoHS Compliant: Yes |
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