Chapter 5 Usage

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.

X0

 

USR

EML

X1

 

X0/X1

X0A

 

USR

EML

X1A

 

X0A/X1A

Figure 5.2-3 Setting the Clock Selector Jumper Plugs (Factory Setting)

Table 5.2-1 Jumper Plug Settings

Jumper plug

Setting

Clock supply

name

 

 

 

 

 

 

USR side

Supply main clock signal from user system.

X0,X1

 

 

EML side

Supply main clock signal from oscillator IC socket on adapt-

 

 

er.

 

 

 

 

 

X0A,X1A

EML side

Supply sub clock signal from oscillator IC socket on adapter.

 

 

 

* : 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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Fujitsu MB2198-130 operation manual Setting the Clock Selector Jumper Plugs, X0/X1