Reset Select Header (P4); Cop Disable Header (P5) - Motorola M68EM05A24 User Manual

3 3.1.1
3.1.2
MOTOROLA
3-2

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.
FABRICATED
JUMPER
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.

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.
COP DISABLE
FABRICATED
P5
JUMPER
TARGET RESET
DRIVEN FROM
1
EVS
2
TARGET
3
P4
1
OPEN = COP OFF
CLOSE = COP ON
2
HC05A24EM USER'S MANUAL