参数资料
型号: 101-1102
厂商: Rabbit Semiconductor
文件页数: 53/112页
文件大小: 0K
描述: KIT DEV RABBIT RCM4100 INTL
标准包装: 1
系列: RabbitCore 4000
类型: MPU 模块
适用于相关产品: RCM4100
所含物品: RabbitCore 模块,开发板,缆线和 Dynamic C? CD-Rom
User’s Manual
41
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.
NOTE: Refer to the Rabbit 4000 Microprocessor User’s Manual for more information
on the spectrum-spreading setting and the maximum clock speed.
1. Select the “Defines” tab from the Dynamic C Options > Project Options menu.
2. Normal spreading is the default, and usually no entry is needed. If you need to specify
normal spreading, add the line
ENABLE_SPREADER=1
For strong spreading, add the line
ENABLE_SPREADER=2
To disable the spectrum spreader, add the line
ENABLE_SPREADER=0
NOTE: The strong spectrum-spreading setting is not recommended since it may limit
the maximum clock speed or the maximum baud rate. It is unlikely that the strong set-
ting will be used in a real application.
3. Click OK to save the macro. The spectrum spreader will now remain off whenever you
use the project file where you defined the macro.
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