User's Manual
Table Of Contents
- About This Book
- Chapter 1 Safety Information
- Chapter 2 1322x Network 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 LCD Connector
- 4.7 Debug/Development Connectors
- 4.8 Audio Subsystem Connections
- 4.9 GPIO Connector
- 4.10 FLASH Memory Recovery Jumpers and Erase
- 4.11 ADC Voltage References
- 4.12 Jumper Selection
- Chapter 5 Schematic, Board Layout, and Bill of Material
Interface Locations and Pinouts
1322x Network Node Reference Manual, Rev. 1.1
4-2 Freescale Semiconductor
4.2 Power Management
The module can be powered from the DC power jack, the USB port, or the battery pack.
4.2.1 Supply Sources
Table 4-1 lists the supply sources, connectors, and voltages. Board maximum current draw is rated at 100
mA.
Table 4-1. Power Supply Sources
4.2.2 On/Off Switch and Power On Indicator
The following are used with the power management:
• Switch SW7 - 4-pole slide switch disconnects ALL sources
• Green LED D5 - indicates power from any source
4.2.3 Power Measurement
It is possible to isolate various circuit blocks to measure current draw via 0-ohm resistors. The resistors
are all mounted as default.
Below is a list of the supplies.
• R68 -> VCC (Output from on-board regulator)
• R65 -> VBATT (Supply for 1322x)
• R80 -> V_DIS (Supply for display circuit)
• R43 -> V_AUD (Supply for audio circuit)
• R64 -> 3V (Output from on-board regulator for GPIO customer access), or alternately, R66 (not
mounted) can enable separate regulator U12.
Source Connector
Min
(Volts)
Typical
(Volts)
Max
(Volts)
Notes
DC Source J5 4.4 5 12 Use DC only source. The connector is a 2 mm DC power
jack; positive center conductor.
USB J6 4.4 5 5.25
AA Battery
Pack
BC1 ~2.0 3 3.2 Two AA cells. Battery pack is automatically disabled by
either DC source or USB. Accessible through the door on
the bottom of the plastic enclosure.