參數(shù)資料
型號(hào)： 20-101-0554
廠商： Rabbit Semiconductor
文件頁(yè)數(shù)： 19/94頁(yè)
文件大?。?/td> 0K
描述： COMPUTER SNGL BD BL2000 BOTT MNT
標(biāo)準(zhǔn)包裝： 1
系列： SBC
模塊/板類型： 單板計(jì)算機(jī)模塊
適用于相關(guān)產(chǎn)品： BL2000
22
Wildcat (BL2000)
3.4 Serial Communication
The BL2000 has one RS-232 serial channel (with RTS/CTS) or two RS-232 (3-wire)
channels, one RS-485 serial channel, and one CMOS serial channel. The RS-232 chan-
nel(s) are configured with the serMode software function call. Table 2 summarizes the
options.
All four serial ports operate in an asynchronous mode. An asynchronous port can handle 7
or 8 data bits. A 9th bit address scheme, where an additional bit is sent to mark the first
byte of a message, is also supported. Serial Port A can be operated alternately in the
clocked serial mode. In this mode, a clock line synchronously clocks the data in or out.
Either of the two communicating devices can supply the clock. The BL2000 series boards
typically use all four ports in the asynchronous serial mode. Serial Ports B and C are used
for RS-232 communication, and Serial Port D is used for RS-485 communication. The
BL2000 uses an 11.0592 MHz crystal, which is doubled to 22.1184 MHz. At this fre-
quency, the BL2000 supports standard baud rates up to a maximum of 230,400 bps.
3.4.1 RS-232
The BL2000 RS-232 serial communication is supported by an RS-232 transceiver, U1. U1
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
CMOS/TTL signals to RS-232 signal levels. Note that the polarity is reversed in an
RS-232 circuit so that a +5 V output becomes approximately -10 V and 0 V is output as
+10 V. U1 also provides the proper line loading for reliable communication.
RS-232 can be used effectively at this baud rate for distances up to 15 m.
3.4.2 RS-485
The BL2000 has one RS-485 serial channel, which is connected to the Rabbit 2000 Serial
Port D through U8, an RS-485 transceiver. U8 supports the RS-485 serial communication
protocol. The chip’s slew rate limiters provide for a maximum baud rate of 230,400 bps,
which allows for a network of up to 300 m (or 1000 ft). The half-duplex communication
uses the Rabbit 2000’s PB6 pin to control the transmit enable on the communication line.
The BL2000 can be used in an RS-485 multidrop network. Connect the 485+ to 485+ and
485– to 485– using single twisted-pair wires (nonstranded, tinned) as shown in Figure 12.
Note that a common ground is recommended.
Table 2. Serial Communication Configurations
Mode
Serial Port
B
C
D
0
RS-232, 3-wire
RS-485
1
RS-232, 5-wire
CTS/RTS
RS-485
相關(guān)PDF資料
PDF描述
006200508130000+ CONN FFC/FPC 8POS 1MM R/A SMD
32FMN-BMTR-A-TB CONN FMN HSNG 32POS SGL REV SMD
32FMN-BMT-A-TF CONN FMN HSNG 32POS SNGL NOR SMD
006200512230000 CONN FFC/FPC 12POS 1MM R/A SMD
101-1051 MODULE MEMORY CORE RCM3365
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
20-101-0555 功能描述:單板計(jì)算機(jī) BL2000 Friction Lock RoHS:否 制造商:Ampro By ADLINK 外觀尺寸:EPIC 處理器類型:Intel Atom D510 頻率:1.66 GHz 存儲(chǔ)容量:2 GB (max) 存儲(chǔ)類型:DDR2, L2 Cache 接口類型:Ethernet, PS/2, SATA, Serial, USB 工作電源電壓:5 V, 12 V 功耗:13 W 最大工作溫度:+ 70 C 尺寸:165.1 mm x 114.3 mm
20-101-0556 功能描述:模塊化系統(tǒng) - SOM BL2000 W/IDCHEADERS RoHS:否 制造商:Digi International 外觀尺寸:ConnectCore 9P 處理器類型:ARM926EJ-S 頻率:150 MHz 存儲(chǔ)容量:8 MB, 16 MB 存儲(chǔ)類型:NOR Flash, SDRAM 接口類型:I2C, SPI, UART 工作電源電壓:3.3 V 最大工作溫度:+ 85 C 尺寸:1.97 in x 1.97 in x 6.1 in
20-101-0561 功能描述:模塊化系統(tǒng) - SOM RCM3400 Rabbit Core RoHS:否 制造商:Digi International 外觀尺寸:ConnectCore 9P 處理器類型:ARM926EJ-S 頻率:150 MHz 存儲(chǔ)容量:8 MB, 16 MB 存儲(chǔ)類型:NOR Flash, SDRAM 接口類型:I2C, SPI, UART 工作電源電壓:3.3 V 最大工作溫度:+ 85 C 尺寸:1.97 in x 1.97 in x 6.1 in
20-101-0562 功能描述:模塊化系統(tǒng) - SOM RCM3410 RABBITCORE RoHS:否 制造商:Digi International 外觀尺寸:ConnectCore 9P 處理器類型:ARM926EJ-S 頻率:150 MHz 存儲(chǔ)容量:8 MB, 16 MB 存儲(chǔ)類型:NOR Flash, SDRAM 接口類型:I2C, SPI, UART 工作電源電壓:3.3 V 最大工作溫度:+ 85 C 尺寸:1.97 in x 1.97 in x 6.1 in
20-101-0563 功能描述:模塊配件 RCM3400 PROTOTYPING BOARD RoHS:否 制造商:Lantronix 產(chǎn)品: 用于:
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*