参数资料
型号: FT4232HQ-TRAY
厂商: FTDI, Future Technology Devices International Ltd
文件页数: 10/45页
文件大小: 0K
描述: IC USB HS QUAD UART/SYNC 64-QFN
标准包装: 260
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:
带调制解调器控制功能:
带CMOS:
安装类型: 表面贴装
封装/外壳: 64-VFQFN 裸露焊盘
供应商设备封装: 64-QFN 裸露焊盘(9x9)
包装: 托盘
配用: 768-1031-ND - MOD USB HS FT4232H EVAL
其它名称: FT4232HQ - TRAY
Copyright 2010 Future Technology Devices International Limited
18
Document No.: FT_000060
FT4232H QUAD HIGH SPEED USB TO MULTIPURPOSE UART/MPSSE IC
Datasheet Version 2.2
Clearance No.: FTDI#78
4.3.2 RS422 Configuration
Figure 4.2 illustrates how the FT4232H can be configured as a dual RS422 interface. The FT4232H can
have all 4 channels connected as RS422, but only channel A and channel C are shown for clarity.
Figure 4.2 Dual RS422 Configuration
In this case both channel A and channel C are configured as UART operating at TTL levels and a level
converter device (full duplex RS485 transceiver) is used to convert the TTL level signals from the
FT4232H to RS422 levels. The PWREN# signal is used to power down the level shifters such that they
operate in a low quiescent current when the USB interface is in suspend mode.
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