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MGC3130 – Sabrewing Single-Zone Evaluation Kit User’s Guide
DS41685A-page 18
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2013 Microchip Technology Inc.
FIGURE 3-2: SABREWING EVALUATION BOARD KEY ELEMENTS
3.2 MGC3130 REFERENCE CIRCUITRY
The key element of the MGC3130 Reference Circuitry is Microchip’s MGC3130 3D
Tracking and Gesture Controller. It is powered by a single 3.3V power supply. The
MGC3130 Reset is controlled by the Reset button on the board or via the
PIC18F14K50. The communication to the USB bridge is realized through I
2
C0.
The five Rx channels of the chip are connected to the electrodes via 1 kOhm resistors
in order to suppress irradiated high-frequency signals.
Please refer to the “
MGC3130 Single-Zone 3D Gesture Controller Data Sheet”
(DS41667).
3.3 ELECTRODES
The Sabrewing Evaluation Board uses a Double Layer Electrode Design with the
electrodes built right into the PCB. They consist of one Tx and five Rx electrodes
(north, east, south, west, center), which are placed in different layers (Figure 3-3).
The dimensions on the electrode’s outer edges are 148 mm x 98.7 mm. The aspect
ratio of the sensing area is 3:2.
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