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(2) Changing the Internal Oscillator Circuit of Emulation Pod
An oscillator circuit board for 10MHz is mounted on this product. To use the emulation pod at a
frequency other than 10MHz, build the desired oscillator circuit on the included OSC-2 oscillator
circuit board (bare board) and replace the board installed in the emulation pod when shipped from
the factory.
Figure 3.5 shows a view of the OSC-2 oscillator circuit board (bare board) and where connector pins
are located. Figure 3.6 shows the circuitry of the OSC-2 oscillator circuit board (bare board). Use the
number of oscillator circuits recommended by the oscillator manufacturer.
Figure 3.5 External view of oscillator board (OSC-2) and connector pin assignment
J1-4: GND
Figure 3.6 Circuit of oscillator board (OSC-2)
J1-3: Oscillator output
J1-2: GND
J1-1: Vcc
Bypass capacitor
* X1: 5.08-mm-pitch 2-pin oscillator IC1: Inverter (Unbuffer)
* X2: 2.54-mm-pitch 2-pin oscillator
* X3: 2.54-mm-pitch 3-pin oscillator
IC1
R1
C2
C1
X1 ,X2
CLK
Vcc
GND
R2
J1-3
1011 8
9
2
1
4
3
6
5
12
13
C3
IC1
J1-1
J1-2
J1-4
GND
IC
1
**
X3
*
IC1
14
7