101-0602 Rabbit Semiconductor, 101-0602 Datasheet - Page 40
101-0602
Manufacturer Part Number
101-0602
Description
COMPUTER SNGL BRD BL2500 44.2MHZ
Manufacturer
Rabbit Semiconductor
Datasheet
1.101-0576.pdf
(106 pages)
Specifications of 101-0602
Module/board Type
Single Board Computer Module
For Use With/related Products
BL2500
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
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3.7 Other Hardware
3.7.1 Clock Doubler
The Coyote takes advantage of the Rabbit 3000 microprocessor’s internal clock doubler.
A built-in clock doubler allows half-frequency crystals to be used to reduce radiated
emissions. The 29.4 MHz frequency specified for the Coyote is generated using a
14.7456 MHz crystal. The clock doubler will not work for crystals with a frequency
above 26.7264 MHz.
The clock doubler may be disabled if 29.4 MHz clock speeds are not required. Disabling
the Rabbit 3000 microprocessor’s internal clock doubler will reduce power consumption
and further reduce radiated emissions. The clock doubler is disabled with a simple config-
uration macro as shown below.
34
1. Select the “Defines” tab from the Dynamic C
2. Add the line
3. Click
The clock doubler is enabled by default, and usually no entry is needed. If you need to
specify that the clock doubler is always enabled, add the line
always enable the clock doubler.
in the project file where you defined the macro.
NOTE: Disabling the clock doubler will degrade the A/D and D/A conversion.
OK
to save the macro. The clock doubler will now remain off whenever you are
CLOCK_DOUBLED=0
to always disable the clock doubler.
Options > Project Options
CLOCK_DOUBLED=1
Coyote (BL2500)
menu.
to
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