M68HC05P3EM/D
3-7
MOTOROLA
1.2 EM LAYOUT
Figure 1-1 shows the layout of the P3EM. Jumper headers J1 and J2 let the user select the
clock source; on board oscillator, target oscillator or MMDS05 oscillator. Note that the target
oscillator requires a single clock supply, it is not suitable to connect a crystal external to the EM
board. Jumper J3 determines the logic direction of the RESET signal at the target connector.
Jumper J4 selects the correct sense of the CPU LIR signal depending on the resident MCU.
Connector P4 is the interface to a target system. This connector can either use a separately
supplied target cable from Motorola or a user-supplied ribbon cable to DIP head. If you install
the P3EM in the MMDS05 station module, the target cable passes through the slit in the station
module enclosure. Connector P1 connects to a logic analyzer. (Connector P1 has more
significance for an EVS system, as an MMDS05 system includes a bus analyzer.) Expansion
header connectors P2 and P3 connect together the EM and the control board (for an MMDS05)
or the EM and the platform board (for an EVS).
P3
P2
P1
J3
P4
1
1
1
J1 J2
MC68HC(7)05P3
J4
1
Figure 1-1. HC05P3 Emulator Module
Freescale Semiconductor, I
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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