RD3172MMA7455L Freescale Semiconductor, RD3172MMA7455L Datasheet - Page 46

• 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

Software Design
5.3.4.4
This command is specially designed to meet all the special requirements of the digital sensor device
5.3.4.5
This is the main, and practically, the only command of the USB stick. This command is used as a net
synchronization message and it’s the only way to get data and other sub commands to the individual sensor
boards. This command is replenished in protocol with mode of operation information (8/16 bits
communication). The Subcommand and data in the subcommand fields are not mandatory.
5.3.5
This group of subcommands relates to the main USB stick RF
subcommands can only be sent as an extension of ZSTAR3_PYLON. Subcommands are the only way to
get data and the majority of commands from the USB stick to individual sensors.
5.3.5.1
This command is designed only to clear the timeout counter
board awake. The sensor board answers with the
5.3.5.2
This command is used only with the ION device mounted on sensor board. The command switches
individual digital work modes of the digital sensor. The sensor board answers with the
command.
5.3.5.3
This command switches off the sensor board. This is only available on those sensor boards without a
mechanical power switch.
5.3.5.4
This command switches the current g range of the sensor to a new one. The sensor board answers with the
ZSTAR3_ACK
1. ZSTAR3 with assembled MMA7455L, MMA7660FC.
2. Each sensor board without a mechanical power switch has an implemented automatic switch off function when a 2 minute
timeout overflows.
46
Zdata Bytes:
ZSTAR3 Protocol SubCommands Description
ZSTAR3_ION
ZSTAR3_PYLON
ZSTAR3_GUI
ZSTAR3_MODE
ZSTAR3_OFF
ZSTAR3_GSEL
command.
List of active
0
sensors
1
Figure 5-2.
Selected
sensor
2
ZSTAR3_PYLON
Subcommand
DRM103, Rev. 2
ZSTAR3_ACK
3
2
Zdata Format
4...
in the sensor board and thus keep the sensor
ZSTAR3_PYLON
command.
Data depends on sub commands
command. All these
Freescale Semiconductor
ZSTAR3_ACK
1
.