參數(shù)資料
型號： 20-101-1197
廠商： Rabbit Semiconductor
文件頁數(shù)： 167/168頁
文件大?。?/td> 0K
描述： MODULE RABBITCORE RCM3910 ROHS
標準包裝： 1
系列： RabbitCore®
模塊/板類型： MPU 核心模塊
適用于相關產(chǎn)品： RCM3910
RabbitCore RCM3900 User’s Manual
98
B.4.6.2 RS-485
The Prototyping Board has one RS-485 serial channel, which is connected to the Rabbit
3000 Serial Port C through an RS-485 transceiver. The half-duplex communication uses
an output from PD7 on the Rabbit 3000 to control the transmit enable on the communica-
tion line. Using this scheme a strict master/slave relationship must exist between devices
to insure that no two devices attempt to drive the bus simultaneously.
Serial Port C is configured in software for RS-485 as follows.
#define ser485open serCopen
#define ser485close serCclose
#define ser485wrFlush serCwrFlush
#define ser485rdFlush serCrdFlush
#define ser485putc serCputc
#define ser485getc serCgetc
#define CINBUFSIZE
15
#define COUTBUFSIZE 15
#ifndef _485BAUD
#define _485BAUD 115200
#endif
The configuration shown above is based on circular buffers. RS-485 configuration may
also be done using functions from the LIB\PACKET.LIB library.
The Prototyping Boards with RCM3900 modules installed can be used in an RS-485 multi-
drop network spanning up to 1200 m (4000 ft), and there can be as many as 32 attached
devices. Connect the 485+ to 485+ and 485– to 485– using single twisted-pair wires as
shown in Figure B-8. Note that a common ground is recommended.
Figure B-8. Multidrop Network
RS-485
RS485+
GND
RS-485
RS485+
GND
RS-485
RS485+
GND
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相關代理商/技術參數(shù)
參數(shù)描述
20-101-1198 功能描述:程序設計器配件 Programmers, Development Systems Accessories - CARD EXPANSION RN1400 ROHS RoHS:否 制造商:Lattice 產(chǎn)品:ispDOWNLOAD Cables 用于:In-system Programming
20-101-1200 功能描述:子卡和OEM板 UNIVERSAL RELAY EXP BOARD RoHS:否 制造商:BeagleBoard by CircuitCo 產(chǎn)品:BeagleBone LCD4 Boards 用于:BeagleBone - BB-Bone - Open Source Development Kit
20-101-1201 功能描述:程序設計器配件 USB PROG CBL WITH 2MM CONN RoHS:否 制造商:Lattice 產(chǎn)品:ispDOWNLOAD Cables 用于:In-system Programming
20-101-1202 功能描述:WiFi/802.11模塊 RCM4400W CORE MODULE Wi-Fi/802.11 RoHS:否 制造商:Taiyo Yuden 支持協(xié)議:802.11 b/g/n 頻帶: 數(shù)據(jù)速率:150 Mbps 接口類型:SDIO 傳輸功率（最大）: 天線連接器類型: 工作電源電壓:3.4 V to 5.5 V 傳輸供電電流: 接收供電電流: 最大工作溫度:+ 80 C 尺寸:35 mm x 15 mm x 2.9 mm
20-101-1207 功能描述:Zigbee/802.15.4模塊 RF/IF and RFID RF Evaluation & Development Kits & Boards - RCM4510W FCC CERTIFIED RoHS:否 制造商:Digi International 頻帶:902 MHz to 928 MHz 視線范圍: 數(shù)據(jù)速率: 靈敏度: 工作電源電壓:2.4 V to 3.6 V 傳輸供電電流:215 mA 接收供電電流:26 mA 輸出功率:250 mW 天線連接器類型:Wire 最大工作溫度:+ 85 C 尺寸:32.94 mm x 22 mm x 2.03 mm
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