NEC PD750008 User Manual
Page 111
91
CHAPTER 5 PERIPHERAL HARDWARE FUNCTIONS
Figure 5-16. Examples of Oscillator Connections Which Should Be Avoided (2/2)
(c) A high pulsating current is too
(d) The current flows through the ground
close to the signal line.
line of the oscillator. (The potential
at points A, B, and C fluctuates.)
(e) A signal is taken directly from
(f)
The signal lines of the main system
the resonator.
clock and subsystem clock are parallel
and adjacent to each other.
Remark When wiring the subsystem clock, read X1 and X2 as XT1 and XT2 respectively. In this case,
a resistor must be added to XT2 in series.
µPD750008
V
SS
X1
X2
High current
µPD750008
V
SS
XT1
XT2
X1
X2
XT2 and XT1 are wired
in parallel.
µPD750008
V
SS
X1
X2
µPD750008
V
SS
X1
X2
High current
A
B
C
V
DD
P
nm