Renesas Single-Chip Microcomputer M37900T2-RPD-E, Руководство пользователя

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(2) Changing the Internal Oscillator Circuit of the Emulation Pod
An oscillator circuit board for 20 MHz is mounted on this product and an oscillator circuit board for
26 MHz is included. To use the emulation pod at a frequency other than 20 MHz and 26 MHz, 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 3.3 shows a view of the OSC-2 oscillator circuit board (bare board) and where connector pins
are located. Figure 3.4 shows the circuitry of the OSC-2 oscillator circuit board (bare board). Use the
number of oscillator circuits recommended by the oscillator manufacturer.
Figure 3.3 External view of the oscillator board (OSC-2) and connector pin assignment
J1-4: GND
Figure 3.4 Circuit of the oscillator board (OSC-2)
J1-3: Oscillator output
J1-2: GND
J1-1: Vcc
IC 1
R 1
C2
C 1
X 1 ,X 2
C LK
V cc
G N D
R 2
J1-3
10 11 8 9
2 1
4 3
6 5
12 13
C 3
IC 1
J1-1
J1-2
J1-4
G N D
IC 1
* *
X 3
*
IC 1
14
7
* 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