- 您現在的位置：買賣IC網 > PDF目錄375950 > FT232BM (Electronic Theatre Controls, Inc.) Generation of FTDI’s Popular USB UART I.C. PDF資料下載
參數資料
| 型號： | FT232BM |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | Generation of FTDI’s Popular USB UART I.C. |
| 中文描述： | 在FTDI的流行的USB UART的新一代集成電路 |
| 文件頁數： | 20/24頁 |
| 文件大小： | 812K |
| 代理商： | FT232BM |
DS232B Version 1.1 Future Technology Devices Intl. Ltd. 2002
Page 20 of 24
FT232BM USB UART ( USB - Serial) I.C.
Figure 12
USB => RS485 Converter Configuration
DB9-M
DM
GND
120R
DP
VCC
4
3
6
2
1
7
8
5
D
R
SP481
FT232BM
PWREN#
SLEEP#
TXD
RXD
RTS#
CTS#
DTR#
DSR#
DCD#
RI#
10
TXDEN
25
24
23
22
15
21
20
19
18
16
LINK
Figure 12 illustrates how to connect the UART interface of the FT232BM to a TTL – RS485 Level Converter I.C. to
make a USB => RS485 converter. This example uses the Sipex SP491 device 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 pin on the FT232BM is provided for exactly that purpose
and so the transmitter enable is wired to TXDEN. 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. A link is 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 FT232BM 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 FT232BM it is possible to do this entirely in hardware – simply modify the schematic so that
RXD of the FT232BM is the logical OR of the SP481 receiver output with TXDEN using an HC32 or similar logic gate.
相關PDF資料 |
PDF描述 |
|---|---|
| FT232R | Incorporating Clock Generator Output and FTDIChip-ID Security Dongle |
| FT232RL | Incorporating Clock Generator Output and FTDIChip-ID Security Dongle |
| FT232RQ | Incorporating Clock Generator Output and FTDIChip-ID Security Dongle |
| FT500AH-80 | Phase Control SCR 320 Amperes Avg 3000-4000 Volts |
| FT500AN-60 | PHASE CONTROL SCR |
相關代理商/技術參數 |
參數描述 |
|---|---|
| FT232BQ | 制造商:FTDI 制造商全稱:FTDI 功能描述:USB UART ( USB - Serial) I.C. |
| FT232BQ-REEL | 功能描述:USB 接口集成電路 USB to Serial UART IC QFN-32 RoHS:否 制造商:Cypress Semiconductor 產品:USB 2.0 數據速率: 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 |
| FT232HL | 制造商:FTDI 制造商全稱:FTDI 功能描述:FT232H Single Channel Hi-Speed USB to Multipurpose UART/FIFO IC |
| FT232HL-REEL | 功能描述:USB 接口集成電路 USB HS to UART/FIFO SPI/JTAG/I2C LQFP-48 RoHS:否 制造商:Cypress Semiconductor 產品:USB 2.0 數據速率: 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 |
| FT232HL-TRAY | 功能描述:USB 接口集成電路 USB HS to UART/FIFO SPI/JTAG/I2C LQFP-48 RoHS:否 制造商:Cypress Semiconductor 產品:USB 2.0 數據速率: 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 |
發布緊急采購，3分鐘左右您將得到回復。