Technical information

2-2
2.2 Connecting User System Interface Cable to User System
2.2.1 Soldering IC Socket
• Apply epoxy resin adhesive to the corner guides and bottom face of an IC socket for the QFP-80A
pin package and fasten it to the user system.
2.2.2 Connecting the MAIN BOARD AND SUB BOARD to user system
• Align pin 1 on the IC socket with pin 1 on the QFP80 SUB BOARD, and insert the QFP80 SUB
BOARD into the IC socket on the user system as shown in figure 2.2.
• Fasten the QFP80 SUB BOARD to the IC socket on the user system with the four screws provided.
Note… Make sure to use the short screws supplied with the user cable and NOT the screws supplied with the
YAMAICHI socket otherwise the target board may be damaged.
Each screw should be tightened a little at
a time, alternating between screws on opposite corners. Use special care to prevent the soldered IC
socket from being damaged by over-tightening the screws or twisting the components.
• Align the MAIN BOARD on top of the QFP 80 SUB BOARD by using the pin 1 arrow (and PCB
chamfer) of the MAINBOARD to the pin 1 arrow of the QFP 80 SUB BOARD. Line up the hole in the
center of the MAIN BOARD with the standoff on the QFP 80 SUB BOARD. There is only a single
way whereby the boards can be connected together as the connectors are polarized.
• After they are aligned, gently push them together.
• Fix the whole assembly with the M3 screw. This provides good mechanical strength for the system.
• Attach the ribbon cables to the emulator ensuring they are oriented correctly. Pls. note the labeling
for each connector and insert accordingly.
• Place the ribbon cables into the main board make sure they are seated in a secured manner.
• Note... The target cable assembly is relying on the integrity of the QFP solder joints, which could
break or fracture if stressed. Therefore it is important to make sure the user cable header assembly
and cable assembly is not twisted. It is also a good idea to support the cables to prevent the user
cable header assembly from dipping.
• Orient the emulator and work area to allow a proper lay-out of the cables between the emulator and
the target system.
• The system can now be powered up by conventional means.