Renesas Single-Chip Microcomputer M37900T2-RPD-E Informacje Techniczne Pobierz pdf (Strona 24)

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(2) Changing the Internal Oscillator Circuit of Emulation Pod

An oscillator circuit board for 20 MHz is mounted on the emulation pod main unit and an oscillator

board for 20 MHz is included. To use the emulation pod at a frequency other than 20 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 oscillator board (OSC-2) and connector pin assignment

J1-4: GND

Figure 3.4 Circuit of oscillator board (OSC-2)

J1-3: Oscillator output

J1-2: GND

J1-1: VCC

* 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

X1 ,X2

CLK

Vcc

GND

J1-3

1011 8

IC1

J1-1

J1-2

J1-4

GND

IC1

1 2 ... 19 20 21 22 23 24 25 26 27 28 29 ... 45 46

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Renesas Single-Chip Microcomputer M37900T2-RPD-E Informacje Techniczne Strona 24