參數(shù)資料
型號： FT2232C
廠商： Electronic Theatre Controls, Inc.
英文描述： FT2232C Dual USB UART / FIFO I.C.
中文描述： FT2232C雙USB的UART / FIFO的集成電路
文件頁數(shù)： 31/51頁
文件大小： 907K
代理商： FT2232C
DS2232C Version 1.4
Future Technology Devices International Ltd. 2005 Page 31 of 54
FT2232C Dual USB UART / FIFO I.C.
Figure 16 - USB <=> RS485 Converter Configuration
Figure 16 illustrates how to connect the UART interfaces of the FT2232C to two TTL – RS485 Level Converter I.C.’s
to make a USB to dual port RS485 converter. This example uses two Sipex SP491 devices but there are similar parts
available from Maxim and Analog Devices amongst others. The SP491 is a RS485 device in a compact 8 pin SOP
package. 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 FT2232C 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 FT2232C 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 FT2232C it is possible to do this entirely in hardware – simply modify the schematic so that RXD
of the FT2232C is the logical OR of the SP481 receiver output with TXDEN using an HC32 or similar logic gate.
DB9-M
RS485 Channel A
DM_A
GND
120R
DPA
VCC
4
3
6
2
1
7
8
5
D
R
SP481
LINK
FT2232C
SLEEP# (ACBUS1)
TXD (ADBUS0)
RXD (ADBUS1)
RTS# (ADBUS2)
CTS# (ADBUS3)
DTR# (ADBUS4)
DSR# (ADBUS5)
DCD# (ADBUS6)
RI# (ADBUS7)
13
TXDEN (ACBUS0)
24
23
22
21
20
19
17
16
15
PWREN#
41
SLEEP# (BCBUS1)
TXD (BDBUS0)
RXD (BDBUS1)
RTS# (BDBUS2)
CTS# (BDBUS3)
DTR# (BDBUS4)
DSR# (BDBUS5)
DCD# (BDBUS6)
RI# (BDBUS7)
29
TXDEN (BCBUS0)
40
39
38
37
36
35
33
32
30
DB9-M
RS485 Channel B
DM_B
GND
120R
DP_B
VCC
4
3
6
2
1
7
8
5
D
R
SP481
LINK
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相關代理商/技術參數(shù)
參數(shù)描述
FT2232C_04 制造商:FTDI 制造商全稱:FTDI 功能描述:Dual USB UART / FIFO I.C.
FT2232D 制造商:Future Technology Devices International 功能描述:UART 2-CH 3.3V/5V 48-Pin LQFP 制造商:Future Technology Devices International 功能描述:UART 2-CH 3.3V/5V 48-Pin LQFP Bulk 制造商:Future Technology Devices International (FTDI Chip) 功能描述:USB Full Speed to Dual Channel Serial UART/FIFO/JTAG/SPI/I2C IC - LQFP-48
FT2232D/TR 制造商:Future Technology Devices International (FTDI Chip) 功能描述:USB-UART/FIFO SMD 2232 LQFP48 制造商:Future Technology Devices International (FTDI Chip) 功能描述:USB-UART/FIFO, SMD, 2232, LQFP48 制造商:Future Technology Devices International (FTDI Chip) 功能描述:USB-UART/FIFO, SMD, 2232, LQFP48; USB Type:FIFO; USB Version:2.0; Supply Voltage Min:3V; Supply Voltage Max:5.25V; Digital IC Case Style:LQFP; No. of Pins:48; Data Rate:12Mbps; No. of Ports:2; Operating Temperature Min:-40C ;RoHS Compliant: Yes
FT2232D-REEL 功能描述:USB 接口集成電路 USB to Dual UART/ FIFO/SPI/JTAG/I2C RoHS:否 制造商:Cypress Semiconductor 產(chǎn)品:USB 2.0 數(shù)據(jù)速率: 接口類型:SPI 工作電源電壓:3.15 V to 3.45 V 工作電源電流: 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:WLCSP-20
FT2232D-TRAY 制造商:Future Technology Devices International (FTDI Chip) 功能描述:DUAL USB TO SERIAL UART/FIFO IC
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