Table of Contents
Advertisement
APPENDIX
Appendix 8. Examples of noise immunity improvement
(3) Oscillator protection using Vss pattern
Print a Vss pattern on the bottom (soldering side) of a double-sided printed circuit board, under the
oscillator mount position.
Connect the Vss pattern to Vss pin of the microcomputer with the shortest possible wiring, separating
it from other Vss patterns.
Fig. 14. Vss pattern underneath mounted oscillator
20–68
An example on the bottom of an
oscillator.
Mounted pattern
example of an
oscillator unit.
Separate Vss lines for oscillation and supply.
7751 Group User's Manual
M37751
X
IN
X
OUT
Vss
Advertisement
Table of Contents
