E6240 Atmel, E6240 Datasheet
E6240
Specifications of E6240
Related parts for E6240
E6240 Summary of contents
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These devices are designed for low cost mobile and consumer electronics applications. QMatrix™ technology employs transverse charge-transfer sensing electrode designs which can be made very compact and are easily wired. Charge is forced from an emitting electrode into the ...
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Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Overview . . . . . . ...
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Overview 1.1 Introduction QT60xx0 devices are digital burst mode charge-transfer (QT) sensors designed specifically for matrix layout touch controls; they include all signal processing functions necessary to provide stable sensing under a wide variety of changing conditions. Only a ...
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The Cs should be connected as shown in Figure 2.7, page 9. The value of these capacitors is not critical but 4.7nF is recommended for most cases. They should be 10 percent X7R ceramics. If the transverse capacitive coupling from ...
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Figure 2.5 Probing X-Drive Waveforms With a Coin QmBtn software is available free of charge on Quantum’s website www.qprox.com. The signal swing from the smallest finger touch should preferably exceed 8 counts, with 12 being a reasonable target. The signal ...
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One way to determine X line settling time is to monitor the fields using a patch of metal foil or a small coin over the key (Figure 2.5). Only one key along a particular X line needs to be observed, ...
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A single ceramic 0.1uF bypass capacitor, with short traces, should be placed very close to supply pins and 6 of the IC. Failure can result in device oscillation, high current consumption, erratic operation etc. ...
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Wiring Pin Function 1 M_SYNC 2 CHANGE 3 Vss 4 Vdd 5 Vss 6 Vdd LATCH 10 Vref 11 S_SYNC Vdd ...
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See Table 2.2 for further connection information. +1.8V to +5V Vunreg VREG follow regulator manufacturers recommended values for input and output bypass capacitors; keep output capacitor close to QT60xx0 pins 4 and 6. If not possible, add a 100nF capacitor ...
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Interfaces 3.1 Introduction The QT60xx0 can be configured to communicate either over bus or a shift register type Serial Peripheral Interface (SPI). The pins A0, A1 are used to configure the type of interface 2 ...
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CHANGE Pin Pin 2 (CHANGE active-high output that can be used to alert the host to key touches or key releases, thus reducing 2 the need for wasteful I C communications. Normally, the host can simply not ...
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Control Commands 4.1 Introduction The devices feature a set of commands which are used for control and status reporting. As well as Table 4.1 refer to Table 6.1, page 21 for further details. Table 4.1 Memory Map Address Use ...
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Table 4.2 Bits for Key Reporting and Numbering Address Note: the device should be reset after disabling keys because key was in detect ...
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Figure 4.1 Power-on or Hardware Reset Flow Chart Read key status registers Addr and 3 Key Detection(s) / End of Detection Processing lQ Power-on or Hardware Reset Verify Setup Block Incorrect Setup Data Correct Setup Block 'CHANGE' output ...
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Operation 5.1 Interface Bus 2 More detailed information about I www.i2C-bus.org. Devices are connected onto the I shown in Figure 5.1. Both bus lines are connected via pull-up resistors. The bus drivers of ...
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Combining Address and Data Packets Into a Transmission A transmission consists of a START condition, an SLA+R/W, one or more data packets and a STOP condition. The wired-ANDing of the SCL line is used to implement handshaking between the ...
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Setups 6.1 Introduction The devices calibrate and process all signals using a number of algorithms specifically designed to provide for high survivability in the face of adverse environmental challenges. They provide a large number of processing options which can ...
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Specifically, drift compensation should be set to compensate faster for increasing signals than for decreasing signals. Decreasin g signals should not be compensated quickly, since an approaching finger could be compensated for partially or entirely before even touching the touch ...
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As an example of the latter foreign object or a finger contacts a key for period longer than the Negative Recal Delay (NRD), the key is by recalibrated to a new lower reference level. Then, when the condition ...
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Since noise synchronization is highly effective and inexpensive to implement strongly advised to take advantage of it anywhere there is a possibility of encountering low frequency (i.e. 50/60Hz) electric fields. Quantum’s QmBtn software can show such noise effects ...
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Setups Block Setups data is sent from the host to the QT using the I reading/writing the appropriate address. Setups can be accessed individually block. Before writing to any setup, an unlock code (value 0x55) must ...
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Typical values: For most touch applications, use the values shown in the outlined cells. Bold text items indicate default settings. The number to send to the QT is the number in the leftmost column (0...15), not numbers from within the ...
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Specifications 7.1 Absolute Maximum Electrical Specifications Operating temp ...
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Power Consumption Test condition 48 keys enabled (see appropriate column) The formula to find the average current is: Idd = (current sleeping x sleep period) + (current running x (burst spacing x number of ...
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Mechanical Dimensions PIN 1 C Dimensions in Millimeters Symbol Minimum A 0. 0.18 E 0.30 F 2.95 G 2.95 e 7.7 Marking MLF Part Number QT60160-ISG QT60240-ISG 7.8 Moisture Sensitivity Level (MSL) MSL ...
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This device is covered under one or more United States and corresponding international patents. QRG patent numbers can be found online at www.qprox.com. Numerous further patents are pending, which may apply to this device or the applications thereof. The ...