M68HC05P3EM/D
3-16
MOTOROLA
3.1.1 Clock Source Select Headers (J1 and J2)
Jumper headers J1 and J2 determines the source of the clock signal. The diagram below
shows the factory configuration: the fabricated jumpers select the P3EM canned oscillator clock
source. To use a clock source originating from the target system reposition the J1 jumper
between pins 1 and 2 and the J2 jumper between pins 1 and 2.
TRGT
MMDS
J2
1
(2)
(3)
FABRICATED
JUMPERS
(J2)
XTAL
J1
1
(2)
(3)
NOTE
The J2 pins 2-and-3 configuration is not correct for a P3EM that is part of an
HC05EVS system.
Freescale Semiconductor, I
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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