101-0898 Rabbit Semiconductor, 101-0898 Datasheet - Page 33
![no-image](/images/no-image-200.jpg)
101-0898
Manufacturer Part Number
101-0898
Description
KIT WEB SECURE EMBEDDED RCM3700
Manufacturer
Rabbit Semiconductor
Series
RabbitCore 3000r
Specifications of 101-0898
Main Purpose
Interface, Ethernet
Utilized Ic / Part
RCM3700
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Secondary Attributes
-
Embedded
-
Primary Attributes
-
Other names
101-898
101-898
101-898
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4.2 Serial Communication
The RCM3700 board does not have any serial transceivers directly on the board. How-
ever, a serial interface may be incorporated on the board the RCM3700 is mounted on. For
example, the Prototyping Board has RS-232, RS-485 and IrDA transceiver chips.
4.2.1 Serial Ports
There are five serial ports designated as Serial Ports A, C, D, E, and F. All five serial ports
can operate in an asynchronous mode up to the baud rate of the system clock divided by 8.
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 is normally used as a programming port, but may be used either as an asyn-
chronous or as a clocked serial port once application development has been completed and
the RCM3700 is operating in the Run Mode.
Serial Ports C and D can also be operated 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.
Serial Ports E and F can also be configured as HDLC serial ports. The IrDA protocol is
also supported in SDLC format by these two ports.
Serial Port F shares its pins with Serial Ports C and D on header J1, as shown in Figure 7.
The selection of port(s) depends on your need for two clocked serial ports (Serial Ports C
and D) vs. a second HDLC serial port (Serial Port F).
Figure 7. RCM3700 Serial Ports C, D, and F
The serial ports used are selected with the
function call, where X is the serial
serXOpen
port (C, D, or F). Remember that RxC and RxD on Serial Ports C and D cannot be used if
Serial Port F is being used
RabbitCore RCM3700 User’s Manual
31
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