E6240 KIT QUANTUM ATMEL, E6240 KIT Datasheet - Page 14

• Manufacturer Part Number: E6240 KIT
• Description: EVALUATION KIT, MATRIX, 16/24 KEY
• Manufacturer: QUANTUM ATMEL

Specifications of E6240 KIT

• Kit Contents: E6240 Assembly, USB Cable, Sample QT60240 IC, CD-ROM Containing QmBtn Software Version 3.29 Or Later
• Development Tool Type: Evaluation Board
• Kit Features: QT60160/QT60240 IC, Serial
• Silicon Manufacturer: Atmel
• Core Architecture: Sensor
• Core Sub-architecture: QTouch
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

4.2.3
4.2.4
4.2.5
4.2.6
Table 2: Communications Port (J2)
USB Connector (J3)
This connector provides direct communication between the E6240 and the computer. It permits full
control over the device including calibration and setups. It also allows for real-time supervision of
signal, reference and calibration information. It uses a standard USB cable (supplied) connected to
a computer.
LEDs
Before the QmBtn software is running, both LED1 and LED2 will be on constantly, to indicate that
the E6240 is connected to the computer and has power (see Figure 10). Once the QmBtn software
is running, LED1 is extinguished and LED2 flickers continuously to indicate that the software is
communicating with the E6240. LED1 will turn on any time there is a change of state on the
keypad.
Scope Sync
The scope sync (J2, pin 9) can be used to synchronize an oscilloscope. When enabled in QmBtn,
this signal provides a pulse that brackets the chosen burst or bursts, making diagnostics much
simpler. With the scope sync enabled for one key, the X matrix drive signals can be clearly seen.
Mains Sync
For external noise sync feed a +3.3V synchronization pulse into pin 5 of J2 with respect to GND.
External fields can cause interference leading to false detections or sensitivity shifts. Most fields
come from AC power sources. RFI noise sources are heavily suppressed by the low impedance
nature of the QT circuitry itself. Noise, such as from 50Hz or 60Hz fields becomes a problem if it is
uncorrelated with acquisition signal sampling; uncorrelated noise can cause aliasing effects in the
key signals. To suppress this problem the M_SYNC input allows bursts to synchronize to the noise
source.
Pin
Name
+5V
Vin
1
+3.3V
2
GND
3
CHANGE
4
E6240 User Manual
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MAINS
SYNC
5
SDA
6
SCL
7
LATCH
8
SCOPE
SYNC
9
N/C
10