Renesas FP-144L 사용자 설명서

Section 4 Installing the MPU to the User System

CAUTION

1. Check the location of pin 1 before inserting.

2. Use a Philips-type screwdriver whose head matches the

screw

head.

3. The tightening torque must be 0.054 N•m or less.

If the applied torque cannot be accurately measured,

stop tightening when the force required to turn the screw

becomes significantly greater than that needed when first

tightening. If a screw is tightened too much, the screw

head may break or an IC socket contact error may be

caused by a crack in the IC socket solder.

4. If the MPU does not operate correctly, cracks might have

occurred in the solder. Check conduction with a tester

and re-solder the IC socket if necessary.

Check the location of pin 1 before inserting the MPU into the IC socket on the user system, as
shown in figure 9. After inserting the MPU, fasten the socket cover with the provided four screws
(M2.0

6 mm). Take special care, such as manually securing the IC socket soldered area, to

prevent the IC socket from being damaged by overtightening the screws or twisting the
components.