Texas Instruments Stellaris LM3S818 User manual

Stellaris® LM3S818 controlCARD Module User’s Manual

November 17, 2011 3

Table of Contents

Chapter 1: Stellaris® LM3S818 controlCARD Module Overview..................................................................6

MDL-LM3S818CNCD Kit Contents.....................................................................................................................6

Compatibility Matrix ............................................................................................................................................7

Using the LM3S818 controlCARD Module .........................................................................................................7

Features..........................................................................................................................................................7

Board Dimensions...........................................................................................................................................7

Chapter 2: Hardware Description....................................................................................................................8

Functional Description ........................................................................................................................................9

Microcontroller and Interfaces (Schematic Page 2)........................................................................................9

Debug Interface, Virtual COM Port, and Isolators (Schematic Page 3)........................................................11

Chapter 3: Software Development ................................................................................................................13

Software Description.........................................................................................................................................13

Source Code.....................................................................................................................................................13

Tool Options .....................................................................................................................................................13

Programming the MDL-LM3S818CNCD controlCARD Module........................................................................14

Appendix A: Schematics................................................................................................................................15

Appendix B: Component Locations..............................................................................................................19

Appendix C: References ................................................................................................................................20

4November 17, 2011

List of Figures

Figure 1-1. MDL-LM3S818CNCD controlCARD Module...................................................................................6

Figure 2-1. Block Diagram.................................................................................................................................8

Figure 2-2. controlCARD Module Isolation ......................................................................................................12

Figure 2-3. controlCARD Module Jumpers......................................................................................................12

Figure B-1. Top-Side Component Location......................................................................................................19

Figure B-2. Bottom-Side Component Location ................................................................................................19

Stellaris® LM3S818 controlCARD Module User’s Manual

November 17, 2011 5

List of Tables

Table 1-1. Compatibility Matrix.........................................................................................................................7

Table 2-1. Signal Table ....................................................................................................................................9

Table 2-2. COM Port Pin Connections...........................................................................................................11

November 17, 2011 6

Stellaris® LM3S818 controlCARD Module Overview

The Stellaris® LM3S818 controlCARD module is a DIMM form-factor module that can be used

standalone or with a range of baseboards to accelerate evaluation and development.

Texas Instruments offers a range of controlCARD baseboards for motor and power-control

application. In most cases. these are available as complete kits that include a controlCARD

module and a baseboard. The Stellaris MDL-LM3S8

Stellaris® LM3S818 controlCARD Module User’s Manual

November 17, 2011 7

• Documentation specific to each supported baseboard

• CrossHairs control GUI Windows application

Tools CD(s)

–Texas Instruments' Code Composer Studio™ IDE

Compatibility Matrix

Table 1-1 shows which baseboards are compatible with the MDL-LM3S818CNCD controlCARD

module.

Using the LM3S818 controlCARD Module

To start using the controlCARD module as a standalone module, see the MDL-LM3S818CNCD

Read Me First document.

To start using the controlCARD module in conjunction with a Texas Instruments’ controlCARD

baseboard, see the Read Me First do

November 17, 2011 8

Hardware Description

In addition to an LM3S818 microcontroller, the controlCARD module includes some simple

multiplexing logic and an integrated Stellairs in-circuit debug interface (ICDI). This chapter

describes how the hardware interfaces to the microcontroller. Figure 2-1 shows the controlCARD

module block diagram.

Figure 2-1. Block Diagram

Stellaris

LM3S818

Microcontroller

Stellaris®

In-Circuit

Debug

Interface

(LM3S3601)

PWM0..5

USB

Stellaris® LM3S818 controlCARD Module User’s Manual

November 17, 2011 9

Functional Description

This section provides a detailed description of the LM3S818 controlCARD module hardware.

Microcontroller and Interfaces (Schematic Page 2)

LM3S818 Microcontroller

The Stellaris LM3S818 is an ARM Cortex-M3-based microcontroller with 64-KB flash memory, 8-

KB SRAM, 50-MHz operation, Motion control PWMs, and a wide range of other peripherals. Refer

to the LM3S818 data sheet for complete device details.

The LM3S818 microcontroller is factory-programmed with a simple quickstart demo program. The

quickstart program resides in on-chip flash memory and runs each time power is applied, unless

the quickstart has been replaced with a user program.

DIMM Edge Connector

Most of the Stellaris microcontroller GPIO signals are routed to the DIMM edge connector.

The controlCARD module is compatible with standard DIMM sockets, such as Molex Part number

87630-1001.

User LEDThe board also has a green User LED connected to GPIO PB6. This GPIO signal is also used to

control the multiplexing of the CCP (Timer) signals and may not be available in some baseboards

applications.

Signal Multiplexing

The DRV8312 and DRV8301 baseboards have Hall-inputs on different DIMM pins. U11

multiplexes these signals under the control of GPIO PB6.

Hardware Description

10 November 17, 2011

Reset The RESET signal into the LM3S818 microcontroller connects to an R-C network (R1/C8) and to

the ICDI circuit for a debugger-controlled reset.

External reset is asserted (active low) under any one of these conditions:

Power-on reset

By the ICDI circuit when instructed by the debugger (this capability is optional, and may not be

supported by all debuggers).

46 CCP2 31(DRV8301),

36(DRV8312) CAP3 CAP3

11 CCP4 29 DAC_PWM1 DAC_PWM1

41 TRSTn 99 TRSTn TRSTn

40 TCK 48 TCK TCK

39 TMS 49 TMS TMS

38 TDI 97 TDI TDI

37 TDO 98 TDO TDO

17 U0Rx 43 GPIO-28

(spare SCI

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