3. TECHNICAL BRIEF
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3.17 Motion Sensor
According to tilt the cell phone, the screen is had rotated automatically.
U701 : KR3DH IC used I2C interface to MSM7227T
Figure. Motion Sensor Schematic
Figure. Motion Sensor Block Diagram
00
7
C
u1.
0
C701
10u
90
7
R
K2.
2
01
7
R
K2.
2
U701
61
7
6
5
4
8
3
9
2
10
1
11
12
13
41 51
2
C
D
A
D
D
V
ADC3
GND2
INT1
VDD_IO
RES
NC1
INT2
NC2
S
C
SCL_SPC
GND1
O
D
S_I
D
S_
A
D
S
0
A
S_
O
D
S
1
C
D
A
MOTION_INT
MOTION_I2C_SCL
MOTION_I2C_SDA
VREG_MOTION_2.6V
CHARGE
AMPLIFIER
MUX
X+
Y+
Z+
a
Z-
Y-
X-
A/D
CONVERTER 1
ADC1 - ADC Input 1
ADC - ADC Input
ADC3 - ADC Input 3
TEMPERATURE
SENSOR
A/D
CONVERTER
CONTROL
LOGIC
1C
SPI
CS
SCL/SPC
SDA/SDO/SDI
SDO/SA0
SELF TEST
REFERENCE
TRIMMING
CIRCUITS
CLOCK
3 Level
FLFO
CONTOROL LOGIC
&
INTERRUPT GEN.
INT 1
INT