KITMMA9550LEVM Freescale Semiconductor, KITMMA9550LEVM Datasheet - Page 13

• Manufacturer Part Number: KITMMA9550LEVM
• Description: Acceleration Sensor Development Tools EVM KIT FOR MMA9550L
• Manufacturer: Freescale Semiconductor

Specifications of KITMMA9550LEVM

• Rohs: yes
• Tool Is For Evaluation Of: MMA955xL
• Acceleration: 2 g, 4 g, 8 g
• Sensing Axis: Triple Axis
• Interface Type: I2C, SPI
• Operating Voltage: 1.8 V
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Operating Current: 3.1 mA
• Output Type: Analog, Digital

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3.4.3
I
The basic configurations are shown in the following two figures. In addition, the RGPIO pins can be programmed to generate
interrupts to a host platform in response to the occurrence of real-time application events. In this case, the pins should be routed
to the external interrupt pins of the CPU.
Sensors
Freescale Semiconductor, Inc.
2
C pullup resistors, a ferrite bead, and a few bypass capacitors are all that are required to attach this device to a host platform.
I2C_DATA
Minimize PCB trace lengths for high-frequency signals. This is especially critical in systems with higher capacitive loads that
could create higher transient currents in the V
Take special care to minimize noise levels on the V
Use separate power planes for V
and digital power and ground planes as close as possible to power supply outputs. If both analog circuit and digital circuits
are powered by the same power supply, it is advisable to connect a small inductor or ferrite bead in series with both the V
and V
Physically separate the analog components from noisy digital components by ground planes. Do not place an analog trace
in parallel with digital traces. It is also desirable to place an analog ground trace around an analog signal trace to isolate it
from digital traces.
Provide an interface to the BKGD/MS pin if in-circuit debug capability is desired.
Ensure that resistors R
configuration, the value of 4.7 kΩ would be appropriate.
I2C_CLK
SSA
MMA955xL Platform as an Intelligent Slave
traces.
4.7KΩ
R3
1.8V
1.8V
P1
and R
R1
4.7KΩ
R2
4.7KΩ
C4
1μF
P2
DD
1.8V
, in the following figure, match the requirements stated in the I
and V
Figure 7. Platform as an I
DDA
C3
0.1μF
DD
and separate ground planes for V
and V
DDA
1
2
3
4
5
SS
U1
MMA955X
and V
VDD
BKGD/MS/IO9
RESETB
SCL0/IO0/SCLK
VSS
circuits.
SSA
pins.
2
C slave
Quiet VDDA for
best performance
IO5/PDB_A/INT_O
SS
0.1μF
C2
and V
IO7/AN1
IO6/AN0
IO4/INT
R4
4.7KΩ
VSS
SSA
. Connect the separate analog
13
12
11
10
9
1.8V
2
C standard. For the shown
C1
1μF
1
L1
10μF BEAD
2
MMA955xL
1.8V
INT_OUT
DDA
13