Renesas M3A-HS19 用户手册

Features and Specifications   

2.8 Power Supply Circuit   

Rev.1.01  Oct 28, .2008 

2-19

REJ10J1351-0101 

 

 

 

2 

2.8  Power Supply Circuit 

 

The main power supply input 5 V DC to the M3A-HS19 and it generates 3.3 V and 1.8 V using a regulator. 

It is an adjustable output voltage regulator to generate a desired voltage by changing resistance values. 

A through-hole is provided with the M3A-HS19 to input 1.8 V DC from an external power supply. The PC card power 

supply is controlled by software. 

Figure 2.8.1 shows the schematic diagram of the power supply circuit. 

 

5 V-IN
  (J7)

5 V
      3.3 V

5 V

      1.8 V

Expansion connector (J12)

SH7619

(U1)

SDRAM

(U3) 

Flash 

memory

(U2)

JP1

JP3

SW1

1

2

5 V

GND

Regulator (U12) 

Regulator (U16)  

1

2

1.8 V-IN
  (J8)

GND

1

2

Other 
logic IC

PB13/BS#

Expansion connector

(J10) 

PCMCIA connector

(J4)

EN0

LTC1470

(U5)

EN1

 

Figure 2.8.1 Power Supply Circuit