User guide

Evaluation Kit Hardware
4-78 Evaluation Kit (EK) User Guide
11115A–ATARM–27-Jul-11
4.4 Optional Display Module (DM) Board Hardware
4.4.1 DM Board Overview
The optional DM board carries a 5.0" TFT LCD module with touch screen. The DM board also carries
four QTouch pads.
Figure 4-54. DM Board Layout
4.4.2 Equipment List
The list of the DM board components follows:
 One 5.0" TFT LCD module
 LCD Back light driver
 3.3V regulator
 QTouch device
 1-Wire device
4.4.3 Function Blocks
4.4.3.1 3.3V Regulator
The DM Board features its own LDO for local power regulation. It accepts DC 5V power from a 500 mA
high-side power switch on the EK and outputs a regulated +3.3 V to most other circuits on the board.
Figure 4-55. DM Board Power Supply
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