Freescale Semiconductor Development Board for MMA955XL KITMMA9551LEVM KITMMA9551LEVM Data Sheet
Product codes
KITMMA9551LEVM
MMA955xL
Sensors
Freescale Semiconductor, Inc.
Freescale Semiconductor, Inc.
9
3.2.2
Sensing Direction and Output Response
The following figure shows the device’s default sensing direction when measuring gravity in a static manner. Also included are
the standard abbreviations or names for the six different orientation modes: portrait up/down, landscape left/right and back/front.
the standard abbreviations or names for the six different orientation modes: portrait up/down, landscape left/right and back/front.
Figure 3. Sensing direction and output response
3.2.3
Pin Functions
The following table
summarizes functional options for each pin on this device.
Table 3. Pin functions
Pin #
Pin Function #1
(1)
1.
Pin function #1 represents the reset state of the hardware. Pin functions can be changed via the SIM pin, mux-control registers in Freescale or user firmware.
Pin Function #2
Pin Function #3
Description
1
V
DD
Digital power supply
2
BKGD/MS
RGPIO9
Background-debug / Mode select / RGPIO9
3
RESETB
(2)
2.
RESETB is an open-drain, bidirectional pin. Reset must be pulled high at startup. After startup, Reset may be asserted to reset the device.
Active-low reset
4
SCL0
RGPIO0
SCLK
Serial clock for slave I
2
C / RGPIO0 / Serial clock for slave SPI
5
V
SS
Digital ground
6
SDA0
RGPIO1
SDI
Serial data for slave I
2
C / RGPIO1 / SPI serial data input
7
RGPIO2
SCL1
SDO
RGPIO2 / Serial clock for master I
2
C / SPI serial data output
8
(3)
3.
RGPIO3/SDA1/SSB = Low at startup selects SPI. High at startup selects I
2
C. This is a function of the application boot code, not of the hardware.
RGPIO3
SDA1
SSB
RGPIO3 / Serial data for master I
2
C / SPI slave select
9
RGPIO4
INT
RGPIO4 / Interrupt input
10
RESERVED (Connect to V
SS
)
(Must be grounded externally.)
11
RGPIO5
PDB_A
INT_O
RGPIO5 / PDB_A / INT_O slave-port interrupt output
12
RGPIO6
AN0
TPMCH0
RGPIO6 / ADC Input 0 / TPM Channel 0
13
RGPIO7
AN1
TPMCH1
RGPIO7 / ADC Input 1 / TPM Channel 1
14
V
DDA
Analog power
15
RGPIO8
PDB_B
RGPIO8 / PDB_B
16
V
SSA
Analog ground
Top View
PU
Gravity
Pin 1
Xout @ 0 g
Yout @ -1 g
Zout @ 0 g
Xout @ 1 g
Yout @ 0 g
Zout @ 0 g
Yout @ 0 g
Zout @ 0 g
Xout @ 0 g
Yout @ 1 g
Zout @ 0 g
Yout @ 1 g
Zout @ 0 g
Xout @ -1 g
Yout @ 0 g
Zout @ 0 g
Zout @ 0 g
LL
PD
LR
Side View
FRONT
Xout @ 0 g
Yout @ 0 g
Zout @ 1 g
Yout @ 0 g
Zout @ 1 g
BACK
Xout @ 0 g
Yout @ 0 g
Yout @ 0 g
Zout @ -1 g