Fujitsu PGA-401P Operation Manual page 36

Setting the Clock Selector Jumper Plugs
Figure 5.2-2 shows the factory settings of the jumper plugs; Table 5.2-1 shows how to set the clock
selector jumper plugs.
Jumper plug
name
X0,X1
X0A,X1A
* : There is no function to supply a clock signal from the adapter to the user system.
Note : To supply a main clock signal from the user system, prepare an oscillation circuit on the user system
and use, for example, a CMOS buffer for buffering before the signal is supplied.
As supplying a subclock signal from the user system may result in unstable operation, be sure to supply
the subclock signal from the adapter board.
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X0
USR
X1
X0/X1
X0A
USR
X1A
X0A/X1A
Figure 5.2-3 Setting the Clock Selector Jumper Plugs (Factory Setting)
Table 5.2-1 Jumper Plug Settings
Setting
USR side Supply main clock signal from user system.
Supply main clock signal from oscillator IC socket on adapt-
EML side
er.
EML side Supply sub clock signal from oscillator IC socket on adapter.
Chapter 5 Usage
EML
EML
Clock supply
29