Renesas M3A-HS86 用户手册

Functional Overview 

2.6  Power Supply Circuit 

Rev.1.0 Feb 06. 2007 

2-13

REJ10J0916-0100 

 

 

 

2 

2.6  Power Supply Circuit 

 

The M3A-HS86 accepts a 5V power supply as its input and generates 3.3V from it by using a regulator. 

The M3A-HS86 (3.3V version) and M3A-HS86 (5V version) are different according to whether R37 and R38 are 

mounted. 

- M3A-HS86 (3.3V version) : R37 is not mounted, R38 is mounted 

- M3A-HS86 (5V version) : R37 is mounted, R38 is not mounted 

Figure2.6.1 shows the block diagram of power supply circuit in the M3A-HS86. 

 
 

5V

Extension Connector

SW1

External Power Supply 
(Only for CPU)

3.3V Device

M3A-HS86 (3.3V version) only

Extension Connector

5VCC

3VCC

5V

⎝

3.3V

VCC

R38

R37

VCC_CPU

VCC_EX

VCC

AVCC
AVREF

SH7086

Flash

Memory

(Not mounted)

SDRAM 

JP1

 

 

Figure2.6.1    Block Diagram of Power Supply Circuit