fma1125dc Fujitsu Microelectronics, Inc., fma1125dc Datasheet - Page 23

• Manufacturer Part Number: fma1125dc
• Description: Touch Sensor Controller
• Manufacturer: Fujitsu Microelectronics, Inc.

Tuning System
The tuning system helps the developer tune the target board with various parameters that determine the performance of the target touch
board. The tuning system is positioned between the PC and the target touch board (Figure 7). It allows the developer to view all the
necessary parameters for tuning and transfers the desired parameters to the FMA1125DC attached on the target touch board.
Hardware
Using this tuning system, the user can send commands to the MCU or receive touch data from the MCU through the USB interface. The
MCU on the USB interface board controls the FMA1125DC on the target touch board via the I
access internal registers in the FMA1125DC.
I
Cable
2
C Communication
4CH I
2
C Communication Port
FMA1125DC Touch Board
PC
Figure 7: Conceptual Diagram for Tuning System
Figure 8: Tuning System (USB Interface Board)
Communication Line On/Off Switch
USB
LCD Brightness
Control Resistor
ROM Select Switch
Confidential
System
Tuning
FMA1125DC Tuning Kit Main Board
16x2 Display LCD
I
2
C
FMA1125DC Demo Board
Test Pin
Touch Board
2
C interface by reading/writing data to
Buzzer
Power On/Off Switch
USB Cable
FMA1125DC
Fujitsu Microelectronics America, Inc.
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