Atmel ARM-Based Evaluation Kit for SAM4S16C, 32-Bit ARM® Cortex® Microcontroller ATSAM4S-WPIR-RD ATSAM4S-WPIR-RD Data Sheet

 12

SAM4S-WPIR-RD [USER GUIDE]

42060A–ATARM–12/2012

LCD Block

LED_A

LED_K4

LED_K1
LED_K2
LED_K3

C53
100nF

+

C52
10uF

R57
4.7K

R54

10K

J4
FH26-39S-0.3SHW

VDD

1

DB17

2

DB16

3

DB15

4

DB14

5

DB13

6

DB12

7

DB11

8

DB10

9

DB9

10

DB8

11

DB7

12

DB6

13

DB5

14

DB4

15

DB3

16

DB2

17

DB1

18

DB0

19

VDD

20

RD

21

WR

22

RS

23

CS

24

RESET

25

IM0

26

IM1

27

GND

28

LED-A

29

LEDK1

30

LEDK2

31

LEDK3

32

LEDK4

33

Y+

34

Y-

35

X+

36

X-

37

NC

38

GND

39

R44
47K

R56

0R

LCD

U7

YXT28MP002A-39A

C54
100nF

+3V_LCD

+3V_LCD

DGND

DGND

DGND

PC2
PC1
PC0

NRST

PC6
PC5
PC4
PC3

PC8
PC19
PA22

PC7

NCS2

PC11

The LCD backlight is made of four integrated white chip-LEDs arranged in parallel. These are driven by an 
AAT3155 charge pump, MN10.The AAT3155 is controlled by the SAM4S through a single PIO line PC13 interface; 
the 0 Ohm resistor R59 is mounted in series on this line, which permits to use it for other custom purposes. In that 
case, the pull-up resistor R58 maintains the charge pump permanently enabled by default.