R0E572167CFK10E Datasheet, PDF (45/54 Pages) Renesas Technology Corp – Microcomputer Development Environment System

Section 4 Installing the MCU to the User System
Section 4 Installing the MCU to the User System
CAUTION
1. Check the location of pin 1 before inserting.
2. Use a Phillips-head screwdriver whose head matches the
screw head.
3. The tightening torque must be 0.054 Nom 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 MCU 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 MCU into the IC socket (NQPACK176SD-ND)
on the user system, as shown in figure 17. After inserting the MCU, use the four provided screws
(M2.0 x 6 mm) to fasten the top cover for the IC package (HQPACK176SD). Take special care,
such as manually holding the soldered portion of the IC socket in place, to prevent the application
of twisting force by overtightening the screws etc.
Rev. 1.00 Jul. 03, 2009 Page 27 of 32
REJ10J2025-0100