HC05A24EM USER’S MANUAL
MOTOROLA
3-2
3
3.1.1
Reset Select Header (P4)
Jumper header P4 controls the path of a target reset. The diagram below
shows the factory configuration: the fabricated jumper between pins 1
and 2 enables your A24EM to reset the target when you press the user
or master reset switch.
Alternatively, you may enable the target system to reset the A24EVS. To
do so:
•
Reposition the A24EM P4 jumper between pins 2 and 3, and
•
Insert a fabricated jumper into platform-board header J3.
3.1.2
COP Disable Header (P5)
Jumper header P5 allows the user to enable/disable the internal COP
during software development. The diagram below shows the factory
configuration: the fabricated jumper between pins 1 and 2 enables the
internal COP. To disable it, remove the fabricated jumper between pins
1 and 2. The jumper setting is sampled once on power on or reset.
Changing the jumper setting after reset will have no effect on the inter-
nal COP.
1
2
3
P4
EVS
TARGET
FABRICATED
JUMPER
TARGET RESET
DRIVEN FROM
1
2
P5
OPEN = COP OFF
FABRICATED
JUMPER
COP DISABLE
CLOSE = COP ON
