20-101-1068 Rabbit Semiconductor, 20-101-1068 Datasheet - Page 98
20-101-1068
Manufacturer Part Number
20-101-1068
Description
MODULE RABBITCORE RCM3315
Manufacturer
Rabbit Semiconductor
Datasheet
1.20-101-1068.pdf
(160 pages)
Specifications of 20-101-1068
Module/board Type
MPU Core Module
Product
Microcontroller Modules
Core Processor
Rabbit 3000
Clock Speed
44.2 MHz
Interface Type
Ethernet, Serial
Flash
512 KB
Timers
10 x 8 bit, 1 x 10 bit
Operating Supply Voltage
3.15 V to 3.45 V
Board Size
47 mm x 69 mm x 22 mm
Core
RCM3315
Processor Series
RCM3315
For Use With/related Products
RCM3315
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
316-1114
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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.
The configuration shown above is based on circular buffers. RS-485 configuration may
also be done using functions from the
The Prototyping Boards with RCM3305/RCM3315 modules installed can be used in an
RS-485 multidrop 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.
92
#define ser485open serCopen
#define ser485close serCclose
#define ser485wrFlush serCwrFlush
#define ser485rdFlush serCrdFlush
#define ser485putc serCputc
#define ser485getc serCgetc
#define CINBUFSIZE
#define COUTBUFSIZE 15
#ifndef _485BAUD
#define _485BAUD 115200
#endif
15
Figure B-8. Multidrop Network
PACKET.LIB
library.
RabbitCore RCM3305/RCM3315
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