MMDS05 CONFIGURATION AND OPERATION
2.1 SETTING F4EM JUMPER HEADERS
Your F4EM has four jumper headers, J1 to J4. This section explains how to configure these
headers.
2.1.1 Clock Source Select Headers (J1, J2)
Jumper headers J1 and J2 determine the source of the clock signal. The diagram below shows
the factory configuration of these jumpers: the fabricated jumper between pins 2 and 3 selects
the F4EM canned oscillator clock source.
MMDS
EM
J1
J2
TOSC1
(J1)
FABRICATED
JUMPERS
1
(2)
(3)
1
(2)
(3)
Alternatively, you may use a clock source originating from the MMDS05 control board. To
do so, reposition the J1 jumper between pins 1 and 2. Then use the MMDS OSC command
to select clock frequency.
Use Jumper J2 to select between an internal generated clock and an external clock generated
by the target system. If the jumper on J2 is between pins 1 and 2 (selecting external clock),
the position of J1 is not important.
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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