ATSAM3X-EK Atmel, ATSAM3X-EK Datasheet - Page 17

• Manufacturer Part Number: ATSAM3X-EK
• Description: Development Boards & Kits - ARM EVAL KIT SAM3X & SAM3A series
• Manufacturer: Atmel

Specifications of ATSAM3X-EK

• Rohs: yes
• Product: Evaluation Kits
• Tool Is For Evaluation Of: SAM3X
• Core: ARM Cortex M3
• Interface Type: Serial
• Operating Supply Voltage: 3.3 V
• Factory Pack Quantity: 1

Figure 4-12. LCD Block
4.3.9.2
Figure 4-13. Backlight Control
4.3.9.3
SAM3X-EK User Guide
Backlight Control
Touch Screen Interface
[3,4,8]
PC[0..30]
The LCD module gets its reset from NRST. As explained previously, this NRST is shared with the JTAG
port and the push button BP1. The LCD chip select signal is connected to NCS2 (a dedicated jumper can
disable it, making NCS2 available for other custom usage).
The SAM3X8H communicates with the LCD through PIOC where a 16-bit parallel “8080-like” protocol
data bus has to be implemented by software.
LCD backlight is made of 4 white chip LEDs in parallel, driven by an AAT3194 charge pump, MN10. The
AAT3194 is controlled by the SAM3X8H through a single line Simple Serial Control (S2Cwire) interface,
which permits to enable, disable, and set the LED drive current (LED brightness control) from a 32-level
logarithmic scale. Four 0-Ohm resistors R44/R45/R46/R47 are implemented for optional current limita-
tion (replace 0 Ohm with the required resistor value).
The LCD module integrates a 4-wire touch screen panel controlled by MN9, ADS7843, which is a slave
device on the SAM3X8H SPI bus.
The ADS7843 touch ADC auxiliary inputs IN3/IN4 are connected to test points for optional function
extension.
+
+
C66
C66
10uF
10uF
[2,3,7]
+3V3
NRST
C67
C67
100nF
100nF
PC22
PC18
PC2
PC3
PC4
PC5
PC6
PC7
PC8
PC9
PC10
PC11
PC12
PC13
PC14
PC15
PC16
PC17
[3,8]
[3,8]
[3,8]
PB27
PB24
PA29
LED_A1
LED_A2
LED_A3
LED_A4
+3V3
X_RIGHT
Y_UP
X_LEFT
Y_DOWN
R44
R44
R45
R45
R46
R46
R47
R47
R60
R60
0R
0R
B2
B2
BN03K314S300R
BN03K314S300R
JP10
JP10
+3V3
0R
0R
0R
0R
0R
0R
0R
0R
+3V3
A1
NWE
NRD
R56
R56
47K
47K
R36
R36
100K
100K
(NCS2)
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
C72
C72
1uF
1uF
C75
C75
4.7uF
4.7uF
1
2
3
4
5
6
7
8
9
J4
J4
FH26-39S-0.3SHW
FH26-39S-0.3SHW
GND1
CS
RS
WR
RD
DB0
DB1
DB2
DB3
DB4
DB5
DB6
DB7
DB8
DB9
DB10
DB11
DB12
DB13
DB14
DB15
NC1
NC2
RESET
GND2
X+
Y+
X-
Y-
GND3
VDD1
VDD2
A1
A2
A3
A4
NC3
NC4
K
10
11
4
3
9
MN10
MN10
AAT3194ITP
AAT3194ITP
C1+
C1-
EN/SET
IN
GND
OUT
C2+
C2-
D1
D2
D3
D4
1
12
2
8
7
6
5
LED_A1
LED_A2
LED_A3
LED_A4
C73
C73
1uF
1uF
2.8" 320x240
TFT LCD DISPLAY
C76
C76
1uF
1uF
11156A–ATARM–25-May-12
FTM280C12D
FTM280C12D
4-9