RD3172MMA7455L Freescale Semiconductor, RD3172MMA7455L Datasheet - Page 51

• Manufacturer Part Number: RD3172MMA7455L
• Description: EVAL BOARD FOR MMA7455L
• Manufacturer: Freescale Semiconductor
• Series: ZSTAR3r

Specifications of RD3172MMA7455L

• Design Resources: ZSTAR3 Schematic
• Sensor Type: Accelerometer, 3 Axis
• Sensing Range: ±2g, 4g, 8g
• Interface: RF
• Sensitivity: 16, 32, 64 LSB/g
• Voltage - Supply: 3V
• Embedded: Yes, MCU, 16-Bit
• Utilized Ic / Part: MMA7455
• Acceleration: 5000 g
• Sensing Axis: Triple Axis
• Output Type: Digital
• Interface Type: I2C, SPI
• Operating Voltage: 3.6 L
• Operating Current: 490 uA
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With/related Products: MMA7455L

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5.4.2
The ZSTAR3 software contains all slightly changed original ZSTAR commands.
Freescale Semiconductor
Command
Length of reply with measured data depends on current work mode, 8/16bits. 6 bytes for 8 bits, 9 bytes for 16 bit mode
Length of reply with calibration values depends on current work mode, 8/16bits. 9 bytes for 8 bits, 15 bytes for 16 bit mode
If a connected sensor has the ZSTAR3 protocol, then this command returns ideal calibration constants
Length of the calibration data command depends on current work mode, 8/16bits. 7 bytes for 8 bits, 13 bytes for 16 bit mode
If a connected sensor has ZSTAR3 protocol, then the calibration data command isn’t important
‘G’
‘R’
‘V’
‘K’
‘g’
‘k’
xg(0), xg(1), yg(0), yg(1), zg(0), zg(1),
Subset of Original ZSTAR Protocol Commands
''X' g(0) g(1) 'Y' g(0) g(1) 'Z' g(0) g(1)
Detail of Command Data
''x' value 'y' value 'z' value
g-select value,
Normal Command
g-select value
result
‘N’
Blue
Red
‘G’, result
Table 5-5. Original STAR Commands
Table 5-6. Legend of Colors
‘K’,
DRM103, Rev. 2
Direction USB stick -> PC, regular data
Length
7
2,
1,. 9
Legend
4
tx/rx
1,6
1,
1,
(B)
,
0,
0,
1
1
1
2
2
2
Direction PC -> USB stick
Extended Asynchronous
{'g',result,index}
{'k',result,index}
Detail
-
-
-
-
Answer
Length
rx (B)
7
7
-
-
-
-
write calibration values
read calibration values
Read acceleration data
Reset to 8 bit mode
g-select write
g-select read
Software Design
Note
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