Atmel SAM3S-EK, User Manual

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Evaluation Kit Hardware
SAM3S-EK Development Board User Guide 4-7
11031A–ATARM–14-Dec-09
Figure 4-8. LCD Block
4.3.8.2 Backlight Control
The LCD backlight is made of four integrated white chip-LEDs arranged in parallel. These are driven by
an AAT3155 charge pump, MN8.The AAT3155 is controlled by the SAM3S through a single PIO line
PC13 interface; the 0 Ohm resistor R68 is mounted in series on this line, which permits to use it for other
custom purposes. In that case, the pull-up resistor R64 maintains the charge pump permanently enabled
by default.
On the anode drive line, a 0 Ohm resistor R59 is implemented in series for an optional current limitation.
Figure 4-9. Backlight Control
4.3.8.3 Touch Screen Interface
The LCD module integrates a 4-wire touch panel controlled by MN7 (ADS7843) which is a slave device
on the SAM3S SPI bus. The controller sends back the information about the X and Y positions, as well
NOT POPULATED
LCD_DB10
LCD_DB11
LCD_DB12
LCD_DB13
LCD_DB14
LCD_DB15
LCD_DB16
LCD_DB17
2. 8 " 3 20x240
TFT LCD DI S PLAY
X_RIGHT
X_LEFT
Y_UP
Y_DOW N
X_LEFT
X_RIGHT
Y_DOW N
Y_UP
LED_K4
LED_K 3
LED_K2
LED_K1
LED_A
PC0
PC1
PC2
PC 3
PC4
PC5
PC6
PC7
NR S T
PC15
PC19
PC11
PC
8
PC1 3
PC24
PC25
PC26
PC27
PC2
8
PC29
PC
3 0
PC 3 1
LCD_DB9
LCD_DB
8
LCD_DB7
LCD_DB6
LCD_DB5
LCD_DB4
LCD_DB
3
LCD_DB2
LCD_DB1
LCD_DB0
LCD_DB0
LCD_DB4
LCD_DB9
LCD_DB5
LCD_DB7
LCD_DB6
LCD_DB 8
LCD_DB1
LCD_DB 3
LCD_DB2
PC2 3
PC22
DGND
DGND
+ 3 V 3
DGND
+ 3 V 3
DGND
DGND
NR S T
PC[0.. 3 1]
D1
PACDN044Y5R
TV S , S OT2 3 -5
D1
PACDN044Y5R
TV S , S OT2 3 -5
1
2
3 4 5
R56
10K
R56
10K
JP1 3 JP1 3
RA 3
DNP
RA 3
DNP
1
2
3
4 5
6
7
8
R61 DNP R61 DNP
+
C4 3
10 u F
+
C4 3
10 u F
PIN s
on
BOT
PIN 39
PIN 1
FTM2 8 0C 3 4D- 8b it
PIN s
on
BOT
PIN 39
PIN 1
FTM2 8 0C 3 4D- 8b it
C44
100nF C44
100nF
J 8
FH26- 3 9 S -0. 3S HW
J 8
FH26- 3 9 S -0. 3S HW
VDD
1
DB17
2
DB16
3
DB15
4
DB14
5
DB1 3
6
DB12
7
DB11
8
DB10
9
DB9
10
DB 8
11
DB7
12
DB6
1 3
DB5
14
DB4
15
DB 3
16
DB2
17
DB1
1 8
DB0
19
VDD
20
RD
21
WR
22
R S
2 3
C S
24
RE S ET
25
IM0
26
IM1
27
GND
2 8
LED-A
29
LEDK1
3 0
LEDK2
3 1
LEDK 3
3 2
LEDK4
33
Y+
3 4
Y-
3 5
X+
3 6
X-
3 7
NC
38
GND
3 9
R5 8
4.7K
R5 8
4.7K
C45
100nF C45
100nF
R6 3 DNP R6 3 DNP
RA2
DNP RA2
DNP
1
2
3
4 5
6
7
8
R59 0R R59 0R
R49
47K R49
47K
LED_A
LED_K1
LED_K2
LED_K
3
LED_K4
PC1 3
+ 3 V 3
+ 3 V 3
DGND
DGND
R6 8
0R
R6 8
0R
C57
4.7
u F
C57
4.7
u F
C55
1
u F
C55
1
u F
MN 8
AAT 3 155ITP-T1
MN 8
AAT 3 155ITP-T1
C1+
10
C1-
9
EN/ S ET
11
C2+
7
C2-
6
OUTCP
8
IN
5
GND
4
D1
3
D2
2
D 3
1
D4
12
R64
47K R64
47K
B1
BN0
3 K 3 14 S3 00R
B1
BN0
3 K 3 14 S3 00R
C56
1
u F
C56
1
u F
C54
1
u F
C54
1
u F TP7
S MD
TP7
S MD