参数资料
型号: AT91SAM9G35-EK
厂商: Atmel
文件页数: 91/95页
文件大小: 0K
描述: KIT EVAL FOR AT91SAM9G35
标准包装: 1
系列: AT91SAM
类型: MCU
适用于相关产品: AT91SAM9G35
所含物品: 板,线缆,电源
Evaluation Kit Hardware
4.4.3.3
Back Light
The back light voltage is generated from a CP2122ST boost converter. It is powered directly by the DC
5V from the EK board. The back light level is controlled by a PWM signal generated from the MPU
Device processor.
Figure 4-57. Back Light Control
5V_INTER
L1
22uH
880mA
5V/217mA
C7
10u
10V
D1
RB160M-60
60V/1A
24.5V/40mA VLED+
C9
2.2u
50V
LCDPWM
5
4
MN1
VIN
SHDN#
SW
GND
FB
1
2
3
CP2122ST
R40
10k
300mV
R41
VLED-
2 x 7 LEDs Back Light
2*20mA, 24.5V
7R5
4.4.3.4
QTouch
The DM board carries a QTouch device piloted through a TWI interface. It manages four capacitive
touch buttons directly printed on the PCB.
There are dual footprints for the QTouch device, and SOIC is the default mounted one.
Figure 4-58. QTouch
3V3_LCD
MN5
3V3_LCD
R63 R56 R57 R58
DNP DNP
3V3_LCD
C14
100n
C16
100n
TWD0
RESET#
CHANGE#
TWCK0
1
2
3
4
5
6
7
VDD
MODE(VSS)
SDA
RESET
CHANGE
SCL
KEY 6
VSS
KEY 0
KEY 1
KEY 2
KEY 3
KEY 4
KEY 5
14
13
12
11
10
9
8
R65
R66
R67
R68
4.7k
4.7k
4.7k
4.7k
MN4
QT1070_SOIC
DNP
10k 4.7k 4.7k 4.7k
TWCK0
TWD0
CHANGE#
RESET#
15
12
14
13
6
7
10
18
19
20
SCL
SDA
CHANGE KEY 6
RESET KEY 5
QT1070 KEY 4
NC5 KEY 3
NC4 KEY 2
NC3 KEY 1
NC2 KEY 0
NC1
NC0
16
17
1
2
3
4
5
KEY 4
KEY 3
KEY 2
KEY 1
R59
R60
R61
R62
4.7k DNP
4.7k DNP
4.7k DNP
4.7k DNP
KEY K4
KEY K3
KEY K2
KEY K1
4-80
11115A–ATARM–27-Jul-11
Evaluation Kit (EK) User Guide
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