Texas Instruments Stellaris LM3S2965, Руководство пользователя, Страница: 19 / 32

January 6, 2010 19
CAN Device Board Hardware Description
The CAN device board uses a Stellaris LM3S2110 microcontroller to demonstrate a complete
two-node network. The board can be used with the main LM3S2965 evaluation board or as a
standalone board.
Device Overview
The Stellaris LM3S2110 ARM Cortex-M3-based microcontroller has 64-KB flash memory, 25-MHz
operation, a CAN module, and a wide range of peripherals. For complete device details, see the
LM3S2110 data sheet (order number DS-LM3S2110).
The LM3S2110 microcontroller is factory programmed with a quickstart demonstration program
that adds a remote volume control feature to the quickstart application. The quickstart program
resides in the LM3S2110 on-chip flash memory and runs each time power is applied, unless the
quickstart has been replaced with a user program.
Power Supply
The CAN device board re5.0-V power from the CAN bus and should not be connected to
a CAN bus that ha a power wire voltage of greater than 10.0 V. If the bus is unpowered, a +5.0-V
local power supply must be provided. The LM3S2110 is powered from a +3.3-V rail, supplied by a
low drop-out (LDO) regulator. +3.3-V power is available for powering external circuits.
Programming and Debugging
A standard two-way header supports both JTAG And SWD programming and debugging using
either the main LM3S2965 board in ICDI out mode or a full-featured debug interface.
Interfacing
Two push switches and an LED implement a very simple user interface. The board’s capabilities
are easily expanded using the I/O breakout headers. For breakout header signal assignments see
Figure B-4.‚ “LM3S2110 CAN Device Board Connections,” on page 30.
C H A P T E R 3