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Freescale Semiconductor MC33794 Setup Instructions

Touch panel system using e-field
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Freescale Semiconductor
MC33794SIUG
User's Guide
Rev. 1.0, 09/2005
MC33794 Touch Panel System
Using E-Field Sensor Setup
Instructions
Reference Design Documentation for RDMC33794
This document contains information on a new product.
Specifications and information herein are subject to change without notice.
© Freescale Semiconductor, Inc., 2005. All rights reserved

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Summary of Contents for Freescale Semiconductor MC33794

  • Page 1 MC33794 Touch Panel System Using E-Field Sensor Setup Instructions Reference Design Documentation for RDMC33794 This document contains information on a new product. Specifications and information herein are subject to change without notice. © Freescale Semiconductor, Inc., 2005. All rights reserved...
  • Page 2 Preface PREFACE This user’s guide provides the installation and setup instructions for the Touch Panel System using MC33794 E-Field Sensor. It describes how to easily program the embedded MCU and the basic hardware configurations to start the demo. AUDIENCE This document is intended for application developers who are setting up Freescale’s RDMC33794 Reference Design.
  • Page 3 The configuration jumpers within the analyzer board are JP1 and JP3. JP1 selects if the input to Microcontroller’s AD channel is feed directly from the MC33794 output pin (LEVEL) or if the output signal is first amplified by the on board op-amp with adjustments in offset and amplitude, and then feed into the MCU (LEVEL_AMP).
  • Page 4 2. Open and configure TeraTerm software, a new connection window will appear, select on the same window “Serial”, select the serial port available at your computer and then press the [OK] button. MC33794 Touch Panel System, Rev. 1.0 Freescale Semiconductor...
  • Page 5 3. Using Code Warrior download the code to the demo board, since this operation will erase the bootloader if any was already on the MCU, make sure the interrupt vectors are located on the standard interrupt vector area. MC33794 Touch Panel System, Rev. 1.0 Freescale Semiconductor...
  • Page 6 6. Once the flash programming process is finished unplug the MONO8 connector and set the switch to USER position. GENERAL BOARD CONFIGURATION TOUCH PANEL BOARD CONNECTOR “JP2” PIN# Description PIN# Description PIN# Description SHIELD SHIELD REF_A REF_B MC33794 Touch Panel System, Rev. 1.0 Freescale Semiconductor...
  • Page 7 R8. Level MC33794’s output. PWR_IN Charge pump output, 10 volts typically measured Amp_Level Amplifier stage output, MC33794’s output with adjustment in offset and amplitude. ANALYZER BOARD JUMPERS AND SWITCHES Jumper Functional description name Position 1-2: Connects microcontroller A/D input channel 3 to E-field output “LEVEL” directly.
  • Page 8 +33 1 69 35 48 48 (French) Freescale Semiconductor assume any liability arising out of the application or use of any support@freescale.com product or circuit, and specifically disclaims any and all liability, including without limitation consequential or incidental damages.

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