RD3172MMA7455L Freescale Semiconductor, RD3172MMA7455L Datasheet - Page 49

• 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

5.3.6.2
The USB stick has three LED’s that indicate actual state of demo. First two LED’s have assign function to
RF protocol, the third one indicate state of USB communication and current running USB application
(serial port, mouse or keyboard). The first two LED’s allows user to check current state of demo:
Also the sensor board has a LED indicator of its current status. It has only a one LED that can tell to user
a few states of demo:
Freescale Semiconductor
•
•
•
•
•
•
Broadcast state - in this state the ZSTAR3 USB Stick software is looking for the any sensor in range
and also is looking for the best possible channel for communication:
— RF channel scout out - LED1 blinks very slowly two times, LED2 is switched off
— ZSTAR3 sensor scout out - LED1 is switched off, LED2 blinks very bright and fast
RF network run state - this is normal work state of ZSTAR3 network. In this state LED1 blinks in
depends on received data messages from sensor, it could blink lightly irregular. LED2 blinks very
fast, but less bright as in broadcast mode.
LED is Off - Demo board sleeps.
LED is lightly blinking with frequency 6.5 Hz - Demo is in broadcast mode and it’s looking for
USB Stick. This state follows after wake-up of board.
LED is brightly blinking with frequency 17 Hz - Demo is still in broadcast mode, but it founds
own ZSTAR3 network (with right NetNum) and its position/index is occupied by any other sensor.
LED is lightly blinking with frequency 30 Hz - Demo is in run mode and it communicate with
USB Stick.
The ZSTAR3 RF protocol LED indication
DRM103, Rev. 2
Software Design
49