User's Manual
Table Of Contents
- About This Book
- Chapter 1 Safety1322x Sensor Node Information
- Chapter 2 1322x Sensor Node Module Overview and Description
- Chapter 3 System Overview and Functional Block Descriptions
- Chapter 4 Interface Locations and Pinouts
- 4.1 Overview
- 4.2 Power Management
- 4.3 RF Circuitry
- 4.4 USB Connector (“B” Receptacle)
- 4.5 LEDs, Switch, Buttons and Joystick
- 4.6 Debug/Development Connector (ARM JTAG Interface)
- 4.7 Audio Subsystem Connections
- 4.8 GPIO Connector
- 4.9 FLASH Memory Recovery Jumpers and Erase
- 4.10 ADC Voltage References
- 4.11 Jumper Selection
- Chapter 5 Schematic, Board Layout, and Bill of Material
System Overview and Functional Block Descriptions
1322x Sensor Node Reference Manual, Rev. 1.1
3-4 Freescale Semiconductor
• Zero-ohm resistors are provided to allow isolation and measurement of various system components
(see Section 4.2.3, “Power Measurement”)
3.4 Low-cost 2.4 GHz ISM Band radio
The MC1322x provides an onboard balun, antenna switch, and LNA. The only external component
required for the radio is an antenna. The Sensor Node provides a pcb printed metal F-antenna for a
complete solution. Figure 3-4 shows the RF network external to the MC1322x.
• Typical nominal output power is 0 dBm, with +4 dBm max
• Typical sensitivity is -95 dBm.
• Frequency range is 2405 to 2480 MHz
• Typical range (outdoors, line of sight) is 300 meters
Figure 3-4. Sensor Node RF Network.
3.5 USB Interface
For many applications or demonstrations it is desirable to connect the Sensor Node to a PC or other device.
A USB port is provided with a USB “B” receptacle plug. The port is connected to a FTDI FT232R USB
UART device that appears as a Virtual COM port (VCP) to the PC. PC drivers are available with the
module.
The USB interface is configured as a “Bus Powered” device and will therefore draw all required power
from the USB interface. The device is USB 2.0 full speed compatible.
3.6 User Interface
The Sensor Node provides multiple means for user interface for both debug and demonstration.
• Four individual pushbuttons can be used as input, and a 4-direction tactile joystick switch with
center push is wired in parallel with the individual pushbuttons. These pushbuttons have interrupt
generation capability.
• Four individual LEDs can be used as indicators for debug or status.
ANT1
F_Antenna
C1
10pF
Not Mounted
L1
3.9nH
Not Mounted
C3
1pF
Not Mounted
RF
RF_RX_TX
RF_GND