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Renesas 32185 User Manual

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32185/32186/32192/32195/32196 Group 
Starter Kit User’s Manual M3A-2154G52B 
REJ10B0223-0140/Rev.1.40 
Jan. 2007 
Page 41 of 79 
 
2.3  MOD Select Circuit   
This circuit is used to set operation modes of the M32R/ECU. The MOD0 power supply is 
configured in such a way that MOD0 is switched from the EXTMOD0 signal of extension connector 
(CON2) by using a jumper (J8). 
The MOD1 power supply defaults to 0 V. The MOD2 power supply is fixed to 0 V. 
 
 
J2
U1
M32R/ECU
MOD1
3
1
2
VCCE
J8
TX6
3
1
2
VCCE
EXTMOD0
MOD0
MOD2
CON2
FX1-144S-1.27DS
* CONx : Connector
* Jx : Jumper
* TXx : Test pin
* Ux : IC
 
Note: TX6 is not mounted but it only has one pattern available. 
 
Figure 2.3    MOD Select Circuit 
 
Table 2.3    Operation Mode Settings 
MOD0 MOD1 MOD2
Description 
0 0 0 
• When flash reprogramming is disabled: Single-chip mode   
• When flash reprogramming is enabled: Flash rewrite + single-chip mode 
1 0 0 
• When flash reprogramming is disabled: Processor mode 
• When flash reprogramming is enabled: Flash rewrite from boot ROM + 
 single-chip mode 
0 
1 
0 
External extension mode 
1 1 0 
Settings 
inhibited 
 
Table 2.4    MOD Select Circuit (Jumper) 
Name Condition 
Description 
Shorted 
between 1–2 
Default 
MOD0 is controled by EXTMOD0 or is set to 0 unless it is 
controled by EXTMOD0 
J8 
Shorted 
between 2–3 
 
Sets MOD0 to 1 
Shorted 
between 1–2 
Default 
Sets MOD1 to 0 
J2 
Shorted 
between 2–3 
 
Sets MOD1 to 1 
Note: The J2 and J8 jumpers are shorted by pattern wiring on the reverse side of printed circuit board. 
Case of setting the condition except for default, setting the jumper is required after cutting the pattern 
for default condition by referring to the chapter 3.8 Setting jumper by cutting