User's Manual

System Overview and Functional Descriptions

1322x-USB Reference Manual, Rev. 1.1

Freescale Semiconductor 3-3

Augmenting the core device on the Sensor Node are:

• Low-cost 2.4 GHz ISM Band radio

• 2.0 USB connection

• User interface LED

• Optional debug / development port

• Reset switch

Users are encouraged to reference the board schematic for the topics covered in the following sections.

Figure 3-4 and Figure 3-5 shows the 1322x USB Dongle/Zniffer PCB top and bottom view with interface

designations.

Figure 3-4. 1322x USB Dongle/Zniffer PCB Top View

Figure 3-5. 1322x USB Dongle/Zniffer PCB Bottom View

3.3 Power Source

The device is powered directly from the USB connection

• The main source is the USB “B” Receptacle

• The USB connection powers the FTDI FT232R USB<>UART interface device. In turn, the

FT232R has an onboard 3.3 V output series regulator that powers the rest of the module.

• A green power-on LED (D5) is provided

Reset SwitchChip Antenna USB “B” Receptacle

NOTE: JTAG header footprint on PCB reverse side.

Power On LED

J1 (JTAG)