BAT32G1x9 user manual | Chapter 4 Clock generation circuit
97 / 1149
Rev.1.02
V
SS
XT1
32.768
kHz
XT2
EXCLKS
Fig. 4-19 XT1 oscillation circuit external circuit example
(a) Crystal oscillation
(b)
external clock
External clock
Note that when using the X1
oscillation circuit and
the XT1
oscillation circuit, in order to avoid the
influence of the wiring capacitance, etc., the
Fig. 4-18418 Fig. 4-19419 must be
routed by the
following method:
• The wiring must be kept as short as possible.
• Cannot cross with other signal lines and cannot approach the wiring through which large currents vary.
• The capacitor grounding point of the oscillation circuit must always be
the
same as the V
SS
potential, and the
grounding pattern of the high current flowing through must not be grounded.
• Signals cannot be taken out of the oscillation circuit.