101-1285 Rabbit Semiconductor, 101-1285 Datasheet - Page 44

• Manufacturer Part Number: 101-1285
• Description: DEV KIT DELUXE MINICORE RCM5600W
• Manufacturer: Rabbit Semiconductor
• Series: MiniCore™r
• Type: Transceiver, 802.11 b/gr

Specifications of 101-1285

• Frequency: 2.4GHz
• Processor To Be Evaluated: Rabbit 5000
• Processor Series: RCM5600W
• Interface Type: RS-232, USB, PCI
• Maximum Operating Temperature: + 55 C
• Minimum Operating Temperature: - 30 C
• Operating Supply Voltage: 3.15 V to 3.45 V
• Silicon Manufacturer: Rabbit Semiconductor
• Silicon Family Name: RabbitCore
• Kit Contents: Board
• Features: On-board Single-Chip 802.11b/g Transceiver, Built-In Web Server
• Development Tool Type: Hardware /
• Rohs Compliant: Yes
• For Use With/related Products: RCM5600W
• Lead Free Status / RoHS Status: Not applicable / Not applicable
• Other names: 316-1161

4.5 Other Hardware
4.5.1 Clock Doubler
The RCM5600W takes advantage of the Rabbit 5000 microprocessor’s internal clock dou-
bler. A built-in clock doubler allows half-frequency crystals to be used to reduce radiated
emissions. The 73.73 MHz frequency specified for the RCM5600W model is generated
using a 36.864 MHz crystal.
The clock doubler should not be disabled since Wi-Fi operations depend highly on CPU
resources.
4.5.2 Spectrum Spreader
The Rabbit 5000 features a spectrum spreader, which helps to mitigate EMI problems. The
spectrum spreader is on by default, but it may also be turned off or set to a stronger setting.
The means for doing so is through a simple configuration macro as shown below.
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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
value whenever a program is compiled using this project file.
ENABLE_SPREADER=1
ENABLE_SPREADER=2
ENABLE_SPREADER=0
NOTE: Refer to the Rabbit 5000 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 be set according to the macro
Options > Project Options
MiniCore RCM5600W
menu.