參數(shù)資料
型號: FT2232HQ-TRAY
廠商: FTDI, Future Technology Devices International Ltd
文件頁數(shù): 39/67頁
文件大?。?/td> 0K
描述: IC USB HS DUAL UART/FIFO 64-QFN
標準包裝: 260
系列: USBmadeEZ-FIFO,F(xiàn)T-X,X-Chip
特點: USB 至 UART 和(或)FIFO、SPI、I2C、JTAG
通道數(shù): 2,DUART
FIFO's: 4096 字節(jié)
規(guī)程: RS232,RS422,RS485
電源電壓: 3 V ~ 3.6 V
帶并行端口:
帶自動流量控制功能:
帶調(diào)制解調(diào)器控制功能:
帶CMOS:
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
包裝: 托盤
其它名稱: FT2232HQ - TRAY
Copyright 2012 Future Technology Devices International Limited
44
Document No.: FT_000061
FT2232H DUAL HIGH SPEED USB TO MULTIPURPOSE UART/FIFO IC
Version 2.21
Clearance No.: FTDI#77
4.11 RS232 UART Mode LED Interface Description
When configured in UART mode the FT2232H has two IO pins on each channel dedicated to controlling
LED status indicators, one for transmitted data the other for received data. When data is being
transmitted / received the respective pins drive from tri-state to low in order to provide indication on the
LEDs of data transfer. A digital one-shot timer is used so that even a small percentage of data transfer is
visible to the end user.
FT2232H
TXLED#
RXLED#
VCCIO
220R
TX
RX
Figure 4.21 Dual LED UART Configuration
Figure 4.21 shows a configuration using two individual LEDs – one for transmitted data the other for
received data.
FT2232H
TXLED#
RXLED#
VCCIO
220R
LED
Figure 4.22 Single LED UART Configuration
In Figure 4.22 the transmit and receive LED indicators are wire-ORed together to give a single LED
indicator which indicates any transmit or receive data activity.
Note that the LEDs are connected to the same supply as VCCIO.
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