Quick Start Guide
TWR-PXN20
32-bit Dual-Core Power Architecture
®
MCU for Connected Performance
TOWER SYSTEM
Quick Start Guide
Get to Know the TWR-PXN20
Primary
Connector
Potentiometer
User Buttons
User LEDs
NEXUS
JTAG
Reset Button
USB OSJTAG
Virtual Serial Port
PXN2020
General-Purpose
TWRPI Connector
Accelerometer
CAN
RS485
Universal
Header
RS232
Secondary
Connector
TWR-PXN20
Freescale Tower System
The TWR-PXN20 module is part of the Freescale Tower System portfolio,
a modular development platform that enables rapid prototyping and tool
re-use through reconfigurable hardware. Elevate your design to the next
level with this industrial powerhouse by building your Tower System today.
2
TOWER SYSTEM
TWR-PXN20 Features
• MPXN2020VMG116 MCU: Up to 116 MHz 32-bit dual-core MCU: e200z6 and
e200z0, 2 MB on-chip flash, 592 KB on-chip SRAM, 32-channel DMA, 6x UART,
3x SPI, 6x CAN, 4x I
2
C, 36-channel 10-bit ADC, Fast Ethernet controller (FEC),
debug JTAG interface and Nexus 3, timed I/Os: eMIOS 24-channel, 16-bit,
internal timers: programmable interrupt timers 8-channel, 32-bit, -40°C/+105°C
temp. range, package options 208 MAPBGA, low-power modes)
• CAN transceiver
• RS485 half duplex transceiver
• RS232 transceiver
• Four LEDs for user interface
• Two mechanical push buttons for user interface
• Potentiometer for ADC testing
• 3-axis accelerometer (MMA8451Q)
• General-purpose TWRPI socket (Tower plug-in module)
• OSJTAG open source JTAG debug interface (MC9S08JM60)
• OSJTAG virtual serial port using USB
• NEXUS, JTAG debug interface
• Universal header (GPIO)
3
Quick Start Guide
Step-by-Step Installation Instructions
In this quick start guide, you will learn how to set up the TWR-PXN20 module and run
the included demonstration software. For more detailed information, please see the
user manual found on the included DVD or at freescale.com/TWR-PXN20.
1
Connecting the
TWR-SER
3
Using the Serial
to USB Bridge
Insert the TWR-PXN20 and TWR-SER
modules into the primary and secondary
elevator module (as shown). The
“primary” and “secondary” cards edges
for each module are indicated along the
card edges.
2
Powering Up the
TWR-PXN20
Connect the TWR-PXN20 module to a
computer or a wall charger using the
provided USB cable. Additionally, the
USB connector on the primary elevator
or OSJTAG connector can be used to
power up the module.
The MC9S08JM60 serial to USB bridge
solution provides an RS-232 equivalent
connection to the host computer through
the USB communications device class.
When plugged in and powered, the USB
connection will enumerate as a COM port
on the PC. This means any terminal utility
program may be used to receive serial
data from the USB port. To determine the
COM port number for the connection, right
click on the My Computer icon and select
“Manage,” click Device Manager, find and
expand ports (COM and LPT).
4
Installing the
Software Driver
When the cable is plugged in for the first
time, the Found New Hardware Wizard
will start. Select the option Install from a
list or specific location (Advanced), then
4
TOWER SYSTEM
select “Next.” Select the CDC Virtual
Serial Port Folder which is available on the
DVD or at freescale.com/TWR-PXN20.
The Wizard will find the updated driver
within the folder and install it.
Additional Software
and Tools
• CodeWarrior V10.x Eclipse
Development Studio
• MQX™ Real-Time OS
• P&E OSBDM OSJTAG Virtual
Serial Toolkit
• FreeMASTER Run Time
Debugging Tool
• Green Hills Software MULTI IDE
• Serial Bootloader Utility
• Rapid Application Initialization
and Documentation Tool (RAppID)
5
Configuring a
Communication Terminal
Open Terminal Utility (Virtual Serial Toolkit
which is available on the DVD or at
freescale.com/TWR-PXN20) or a terminal
program of your choice. Open the COM
port from step 4 with the following settings:
• Bits per Second: 115200
• Data Bits: 8
• Parity: None
• Stop Bit: 1
• Flow Control: None
6
Running
Demonstration Code
Press the RESET button on the
TWR-PXN20 module and follow the
output information on the terminal
screen. The installed program will display
example outputs from the device and
allow you to interact with the user
buttons, user LEDs and others.
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