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| 型号： | FT232RL-REEL |
| 厂商： | FTDI, Future Technology Devices International Ltd |
| 文件页数： | 5/43页 |
| 文件大小： | 0K |
| 描述： | IC USB FS SERIAL UART 28-SSOP |
| 产品培训模块： | USB Introduction USB-UART Interface Solutions |
| 标准包装： | 1 |
| 系列： | USBmadeEZ-UART |
| 特点： | USB 至 UART |
| 通道数： | 1，UART |
| FIFO's： | 256 字节 |
| 规程： | RS232，RS422，RS485 |
| 电源电压： | 3.3 V ~ 5.25 V |
| 带自动流量控制功能： | 是 |
| 带调制解调器控制功能： | 是 |
| 带CMOS： | 是 |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 28-SSOP（0.209"，5.30mm 宽） |
| 供应商设备封装： | 28-SSOP |
| 包装： | 标准包装 |
| 产品目录页面： | 634 (CN2011-ZH PDF) |
| 配用： | 768-1023-ND - MOD USB RS232 DEV/EVAL FT232RL 768-1022-ND - MOD USB UART MINI B DEV FT232R 768-1021-ND - MOD USB UART MINI DEV FT232R 768-1019-ND - MOD USB UART DEV FT232R |
| 其它名称： | 768-1007-6 |
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Copyright 2010 Future Technology Devices International Limited
13
Document No.: FT_000053
FT232R USB UART IC Datasheet Version 2.10
Clearance No.: FTDI# 38
3.5 CBUS Signal Options
The following options can be configured on the CBUS I/O pins. CBUS signal options are common to both
package versions of the FT232R. These options can be configured in the internal EEPROM using the
software utility FT_PPROG or MPROG, which can be downloaded from the FTDI Utilities
(www.ftdichip.com). The default configuration is described in Section 8.
CBUS
Signal
Option
Available On CBUS Pin
Description
TXDEN
CBUS0, CBUS1, CBUS2, CBUS3, CBUS4
Enable transmit data for RS485
PWREN#
CBUS0, CBUS1, CBUS2, CBUS3, CBUS4
Output is low after the device has been configured by
USB, then high during USB suspend mode. This output can
be used to control power to external logic P-Channel logic
level MOSFET switch. Enable the interface pull-down
option when using the PWREN# in this way.*
TXLED#
CBUS0, CBUS1, CBUS2, CBUS3, CBUS4
Transmit data LED drive: Data from
USB Host to
FT232R. Pulses low when transmitting data via USB. See
Section 7.5 for more details.
RXLED#
CBUS0, CBUS1, CBUS2, CBUS3, CBUS4
Receive data LED drive: Data from
FT232R to USB Host.
Pulses low when receiving data via USB. See Section 7.5
for more details.
TX&RXLED#
CBUS0, CBUS1, CBUS2, CBUS3, CBUS4
LED drive – pulses low when transmitting or receiving data
via USB. See Section 7.5 for more details.
SLEEP#
CBUS0, CBUS1, CBUS2, CBUS3, CBUS4
Goes low during USB suspend mode. Typically used to
power down an external TTL to RS232 level converter IC
in USB to RS232 converter designs.
CLK48
CBUS0, CBUS1, CBUS2, CBUS3, CBUS4
48MHz
±0.7% Clock output. **
CLK24
CBUS0, CBUS1, CBUS2, CBUS3, CBUS4
24 MHz Clock output.**
CLK12
CBUS0, CBUS1, CBUS2, CBUS3, CBUS4
12 MHz Clock output.**
CLK6
CBUS0, CBUS1, CBUS2, CBUS3, CBUS4
6 MHz
±0.7% Clock output. **
CBitBangI/O
CBUS0, CBUS1, CBUS2, CBUS3
CBUS bit bang mode option. Allows up to 4 of the CBUS
pins to be used as general purpose I/O. Configured
individually for CBUS0, CBUS1, CBUS2 and CBUS3 in the
internal EEPROM. A separate application note, AN232R-01,
available from FTDI website (www.ftdichip.com) describes
in more detail how to use CBUS bit bang mode.
BitBangWRn
CBUS0, CBUS1, CBUS2, CBUS3
Synchronous and asynchronous bit bang mode WR#
strobe output.
BitBangRDn
CBUS0, CBUS1, CBUS2, CBUS3
Synchronous and asynchronous bit bang mode RD# strobe
output.
Table 3.9 CBUS Configuration Control
* PWREN# must be used with a 10kΩ resistor pull up.
**When in USB suspend mode the outputs clocks are also suspended.
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