Voltage Supply
MC33794 Touch Panel System, Rev. 1.0
Freescale Semiconductor
4
VOLTAGE SUPPLY
The first step is to prepare the Analyzer Board by plugging the 9V battery or connecting an external 9V source to the Jack
“P1”, when connecting battery and external supply at the same time, the external power supply jack will disconnect the battery
VCC terminal.
For powering Analyzer Board make
sure power supply, either battery or
external power supply doesn’t exceed
15V.Place a common 9 volts battery
on the battery holder with the
appropriate polarity, or c9V
center positive on the jack for external
power supply and then move “S1” to
the “ON” position.
With the default firmware up into the
microcontroller and the default
settings described above, the
application should be running; LED’s,
7 segments displays and audio
transducer will provide feedback as
the system detects a pressed
condition within the touch pads.
PROGRAMMING SETTINGS
PROGRAMMING THROUGH SERIAL BOOTLOADER TOOL
When running the loaded program in the demo, the USER/MON08 switch “S2” should be on the USER position; USER mode is
also used when programming the microcontroller using the serial bootloader tool.
To download the firmware using the bootloader tool:
1. Make sure all the required programs are available in the programmer PC, you must have the *.S19 file to be downloaded
into the MCU, TeraTerm software used for serial communications, and the required bootloader already programmed into
the demo board MCU.
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.
On/Off Switch
