参数资料
| 型号： | 101-0558 |
| 厂商： | Rabbit Semiconductor |
| 文件页数： | 26/94页 |
| 文件大小： | 0K |
| 描述： | COMPUTER SNG BD BL1800 512K SRAM |
| 标准包装： | 10 |
| 系列： | SBC |
| 模块/板类型： | 单板计算机模块 |
| 适用于相关产品： | BL1800 |
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Jackrabbit (BL1800)
3.5 Serial Communication
The Jackrabbit has two RS-232 (3-wire) serial channels, one RS-485 serial channel, and
one synchronous CMOS serial channel.
3.5.1 RS-232
The Jackrabbit’s two RS-232 serial channels are connected to an RS-232 transceiver, U4,
an industry-standard MAX232 chip. U4 provides the voltage output, slew rate, and input
voltage immunity required to meet the RS-232 serial communication protocol. Basically,
the chip translates the Rabbit 2000’s 0 V to +Vcc signals to ±10 V. Note that the polarity is
reversed in an RS-232 circuit so that +5 V is output as –10 V and 0 V is output as +10 V.
U4 also provides the proper line loading for reliable communication.
The Rabbit 2000 serial port B signals are presented as RS-232 compliant signals TXB
(serial port B transmit) and RXB (serial port B receive) on header J5.
The Rabbit 2000 serial port C signals are presented as RS-232 compliant signals TXC
(serial port C transmit) and RXC (serial port C receive) on header J5.
The maximum baud rate for each RS-232 serial channel is 115,200 bps. RS-232 can be
used effectively at this baud rate for distances up to 15 m.
Because two RS-232 transmit and two RS-232 receive lines are available, one serial chan-
nel can be used for serial transmit and receive, and the other serial channel can be used as
a general digital I/O for RTS/CTS handshaking. Although the present release of Dynamic C
does not support RTS/CTS handshaking in its libraries, it is possible to write your own
software.
3.5.2 RS-485
The Jackrabbit has one RS-485 serial channel, which is connected to the Rabbit 2000
serial port D through U6, an RS-485 transceiver. U6 supports the RS-485 serial communica-
tion protocol. The chip’s slew rate limiters provide for a maximum baud rate of 250,000 bps.
The half-duplex communication uses the Rabbit 2000’s PD5 pin to control the data enable
on the communication line.
The Jackrabbit can be used in an RS-485 multidrop network. Connect the RS-485+ to
RS-485+ and RS-485– to RS-485– using single twisted-pair wires (nonstranded, tinned)
as shown in Figure 11.
相关PDF资料 |
PDF描述 |
|---|---|
| 396-036-526-204 | CARD EDGE 36POS DL .125X.250 BLK |
| 396-036-526-202 | CARD EDGE 36POS DL .125X.250 BLK |
| 101-0411 | INTERFACE 12KEYDISP ETHNT OP6700 |
| AT24C02A-10PI-2.7 | IC EEPROM 2KBIT 400KHZ 8DIP |
| AT24C02A-10PI-1.8 | IC EEPROM 2KBIT 400KHZ 8DIP |
相关代理商/技术参数 |
参数描述 |
|---|---|
| 10105584 | 制造商:Amphenol Corporation 功能描述:10-341374-222 - Bulk |
| 101055OO | 制造商:TE Connectivity 功能描述: |
| 101056084S | 制造商:Amphenol Aerospace 功能描述:CONNECTOR |
| 101-0561 | 功能描述:模块化系统 - SOM RCM3400 RABBITCORE RoHS:否 制造商:Digi International 外观尺寸:ConnectCore 9P 处理器类型:ARM926EJ-S 频率:150 MHz 存储容量:8 MB, 16 MB 存储类型:NOR Flash, SDRAM 接口类型:I2C, SPI, UART 工作电源电压:3.3 V 最大工作温度:+ 85 C 尺寸:1.97 in x 1.97 in x 6.1 in |
| 10-105610-02S | 制造商:Amphenol Aerospace 功能描述:PLUG |
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