101-1050 Rabbit Semiconductor, 101-1050 Datasheet - Page 108
![KIT DEV RABBITCORE RCM3750](/photos/9/21/92195/101-1049_sml.jpg)
101-1050
Manufacturer Part Number
101-1050
Description
KIT DEV RABBITCORE RCM3750
Manufacturer
Rabbit Semiconductor
Series
RabbitCore 3000r
Type
MPU Moduler
Datasheet
1.20-101-1028.pdf
(172 pages)
Specifications of 101-1050
Contents
RabbitCore Module, Dev. Board, AC Adapter, Cable and Dynamic C® CD-Rom
Processor To Be Evaluated
RCM3750
Data Bus Width
8 bit
Interface Type
Ethernet
For Use With/related Products
RCM3750
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Other names
101-1049
101-1049
316-1117
Q2479714
Q2828455
101-1049
316-1117
Q2479714
Q2828455
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B.1.6.2 RS-485
The RCM3700 Prototyping Board has one RS-485 serial channel, which is connected to
the Rabbit 3000 Serial Port E through an RS-485 transceiver. The half-duplex communi-
cation uses an output from PF5 on the Rabbit 3000 to control the transmit enable on the
communication 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 E 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 RCM3700 Prototyping Boards with RCM3750 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.
102
#define ser485open serEopen
#define ser485close serEclose
#define ser485wrFlush serEwrFlush
#define ser485rdFlush serErdFlush
#define ser485putc serEputc
#define ser485getc serEgetc
#define EINBUFSIZE
#define EOUTBUFSIZE 15
Figure B-8. RCM3750 Multidrop Network
15
PACKET.LIB
library.
RabbitCore RCM3750
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