User manual

6-2 SAM9N12/CN11-EK User Guide
11186A–ATARM–29-Nov-12
6.3 Function Blocks
6.3.1 3.3V Regulator
The SAM9N12/CN11-DM board features its own LDO for local power regulation. It accepts DC 5V power
from a 500 mA power
switch on the EK and outputs a regulated +3.3V to most other circuits on the
board.
Figure 6-2. DM Board Power
Supply
6.3.2 TFT LCD with Touch Panel
The SAM9N12/CN11-DM board features an LCD controller.
The 4.3" 480x272 LCD provides the DM
with a low power LCD display feature, back light unit and a touch panel, similar to that used on commer-
cial PDAs.
Graphics and text can be displayed on the dot matrix panel with up to 16 million colors by supplying
24-
bit data signals (8 bit x RGB by default). This allows the user to develop graphical user interfaces for a
wide variety of end applications.
Warning: Never
connect/disconnect the LCD display from the board while the power supply is on. Doing
so may damage both units.
C12
10u
C10
10u
3V3_LCD
C11
100n
C15
2.2u
MN3
SPX3819
VIN
1
GND
2
EN
3
BYP
4
VOUT
5
C13
100n
5V_INTER
SELCONFIG
500mA capability