101-1158 Rabbit Semiconductor, 101-1158 Datasheet - Page 45
101-1158
Manufacturer Part Number
101-1158
Description
KIT DEVELOPMENT INT'L RCM4100
Manufacturer
Rabbit Semiconductor
Series
RabbitCore 4000r
Type
MPU Moduler
Datasheet
1.20-101-1093.pdf
(112 pages)
Specifications of 101-1158
Contents
RabbitCore Module, Dev. Board, AC Adapter, Cable and Dynamic C® CD-Rom
Processor To Be Evaluated
Rabbit 4002
Data Bus Width
8 bit
Interface Type
SPI
For Use With/related Products
RCM4100
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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4.5 Other Hardware
4.5.1 Clock Doubler
The clock doubler on the RCM4100 is disabled by default.
4.5.2 Spectrum Spreader
The Rabbit 4000 features a spectrum spreader, which helps to mitigate EMI problems. By
default, the spectrum spreader is on automatically, but it may also be turned off or set to a
stronger setting. The means for doing so is through a simple global macro as shown below.
User’s Manual
1. Select the “Defines” tab from the Dynamic C
2. Normal spreading is the default, and usually no entry is needed. If you need to specify
3. Click
normal spreading, add the line
For strong spreading, add the line
To disable the spectrum spreader, add the line
use the project file where you defined the macro.
ENABLE_SPREADER=1
ENABLE_SPREADER=2
ENABLE_SPREADER=0
NOTE: Refer to the Rabbit 4000 Microprocessor User’s Manual for more information
NOTE: The strong spectrum-spreading setting is not recommended since it may limit
OK
on the spectrum-spreading setting and the maximum clock speed.
the maximum clock speed or the maximum baud rate. It is unlikely that the strong set-
ting will be used in a real application.
to save the macro. The spectrum spreader will now remain off whenever you
Options > Project Options
menu.
41
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