Fujitsu 8FX User Manual

MB95630H Series
54 FUJITSU SEMICONDUCTOR LIMITED MN702-00009-2v0-E
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.
Figure 3.6-2 Sample Connection of External Clocks
CCCC
X0 X1 X0A X1A
Main clock
oscillator circuit
Subclock
oscillator circuit
Connecting to two external clocks
Open Open
X0 X1 X0A X1A
Main clock
oscillator circuit
Subclock
oscillator circuit
X1 open
Open
X0 X1 X0A X1A
Main clock
oscillator circuit
Subclock
oscillator circuit
Inverted X0 input to X1

Fujitsu 8FX Specifications

General

Brand	Fujitsu
Model	8FX
Category	Computer Hardware
Language	English