Renesas CPU Board M3A-HS19 Informações Técnicas descarregar pdf (Página 35)

Features and Specifications

2.8 Power Supply Circuit

Rev.1.01

Oct 28, .2008 2-19

REJ10J1351-0101

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

5 V

GND

Regulator (U12)

Regulator (U16)

.8 V-IN

(J8)

GND

Other

logic IC

PB13/BS#

Expansion connector

(J10)

PCMCIA connector

(J4)

EN0

LTC1470

(U5)

EN1

Figure 2.8.1 Power Supply Circuit

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