Clock Oscillator Circuit - Fujitsu MB95630H Series Hardware Manual

CHAPTER 3 CLOCK CONTROLLER

3.6 Clock Oscillator Circuit

3.6 Clock Oscillator Circuit
The clock oscillator circuit generates an internal clock with an oscillator
connected to the clock oscillation pin or by inputting a clock signal to the clock
oscillation pin.
■ Clock Oscillator Circuit
● Using crystal oscillators and ceramic oscillators
Connect crystal oscillators or ceramic oscillators as shown in Figure 3.6-1.
Figure 3.6-1 Sample Connection of Crystal Oscillators and Ceramic Oscillators
● Using external clock
As shown in Figure 3.6-2, connect the external clock to the X0 pin while leaving the X1 pin
unconnected or supplying inverted clock of the X0 pin to the X1 pin (refer to the device data
sheet). To supply clock signals to the subclock from an external clock, connect that external
clock to the X0A pin while leaving the X1A pin unconnected.
Main clock
oscillator circuit
X0
54
Connecting to two external clocks
Main clock
oscillator circuit
X0
C
Figure 3.6-2 Sample Connection of External Clocks
X1 open
Subclock
oscillator circuit
X1 X0A X1A
Open Open
FUJITSU SEMICONDUCTOR LIMITED
Subclock
oscillator circuit
X1 X0A X1A
C C C
Inverted X0 input to X1
Main clock
oscillator circuit
X0 X1
MB95630H Series
Subclock
oscillator circuit
X0A X1A
Open
MN702-00009-1v0-E