Atmel ARM-Based Evaluation Kit for SAM4S16C, 32-Bit ARM® Cortex® Microcontroller ATSAM4S-WPIR-RD ATSAM4S-WPIR-RD Scheda Tecnica
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Codici prodotto
ATSAM4S-WPIR-RD
12
SAM4S-WPIR-RD [USER GUIDE]
42060A–ATARM–12/2012
Figure 4-8.
LCD Block
LED_A
LED_K4
LED_K1
LED_K2
LED_K3
LED_K2
LED_K3
C53
100nF
100nF
+
C52
10uF
10uF
R57
4.7K
4.7K
R54
10K
J4
FH26-39S-0.3SHW
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
47K
R56
0R
LCD
U7
YXT28MP002A-39A
C54
100nF
100nF
+3V_LCD
+3V_LCD
DGND
DGND
DGND
PC2
PC1
PC0
PC1
PC0
NRST
PC6
PC5
PC4
PC3
PC5
PC4
PC3
PC8
PC19
PA22
PC19
PA22
PC7
LCD
NCS2
PC11
4.2.13
Backlight Control
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.
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.