SNL320

16-Bit LCD Controller

VCC

BUO1/VO

1K

BUO1/VO

BUO2

DAC output

Push-Pull output

10. Internal Regulator

The power system of SNL320 can be separated into two groups, one is 3V and

another one is 5V. The power of core logic and SRAM, ROM is comes from 3V power

group. And the power of all I/O, DA/Push-Pull, clock system is comes from 5V power

group.

Considering user’s application, SNL320 built-in a regulator to solve the different

power problem. Please refer to the following connection diagram.

3V

CVDD

VDDIO

VOUT_REG

5V

CVDD

VDDIO

VOUT_REG

SNL320

SNL320

C1

3V power system

5V power system

For 3V power system (2 batteries application), all the power pins should be

connected together.

Ver: 1.2

12

July 22, 2005