Renesas 32185 Manual De Usuario

32185/32186/32192/32195/32196 Group 

Starter Kit User’s Manual M3A-2154G52B 

REJ10B0223-0140/Rev.1.40 

Jan. 2007 

Page 44 of 79 

 

2.5 Oscillator 

Circuit 

 

The oscillator circuit can be selected from three options by using the jumper J1: a surface 
mount-type 20 MHz crystal oscillator module, a surface mount-type 10 MHz crystal oscillator 
module or a crystal resonator. By default, the surface mount-type 20 MHz crystal oscillator module 
is selected. 
 

 

 
 

 

 
 

 

 
 

 

 
 

 

 
 

 

 
 

 

 
 
Figure 2.5  Oscillator Circuit  
 

Note: The shaded sections in the above diagram have only patterns available. When using the resonator Y1, please be 

sure to add capacitors (C1, C2) and a resistor (R2, R4). 

 

Table 2.8    Oscillator Circuit Connections (Jumper)   

Name Condition 

Description 

Shorted 

between 1–4 

Default 

Outputs a clock from X1 (surface mount-type oscillator module) 

Shorted 

between 2–4 

(Note1) 

Outputs a clock from X2 (surface mount-type oscillator module) 

J1 

Shorted 

between 3–4 

 

Outputs a clock from Y1 (resonator) 

Note1: Using M32186F8VFP, the J1 jumper should be shorted between 2-4. 

 

U1
M32R/ECU

XOUT

J1

1

2

X1

XIN

 Surface mount-type
 oscillator module
        10MHz

OUT

 Surface mount-type
 oscillator module
        20MHz

C1

R2

R4

Y1

X2

C2

OUT

3

4

* Cx : Capacitor
* Jx : Jumper
* Rx : Resister
* Ux : IC
* Xx : Oscillator modules
* Yx : Resonator