Atmel AT91SAM7L-STK Manual de usuario descargar pdf (Pagina 24)

Configuration

AT91SAM7L-EK Evaluation Board User Guide 4-5

6370A–ATARM–15-Feb-08

4.5 Power Supply Schemes

The following figures illustrate the three typical power supply schematics of the AT91SAM7L related to

J107, J108 and J109 jumper configurations.

Figure 4-3. The LCD Charge Pump supplies the LCD Voltage Regulator (J107 in 1 - 2 position, J108

in 1 - 2 position, J109 Opened)

Figure 4-4. The LCD Voltage Regulator is externally supplied (J107 in 2 - 3 position, J108 in 2 - 3

position, J109 Opened)

Charge

Pump

VDDINLCD

CAPP2

CAPM1

CAPP1

CAPM2

VDDLCD

VDDIO2

VDD3V6

LCD

Voltage

Regulator

External supply