EVK1040A Atmel, EVK1040A Datasheet
EVK1040A
Specifications of EVK1040A
Related parts for EVK1040A
EVK1040A Summary of contents
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Features • Number of Keys: – • Discrete Outputs: – 4 discrete outputs indicating individual key touch • Technology: – Patented spread-spectrum charge-transfer (direct mode) • Electrode Design: – Simple self-capacitance style (refer to the Touch Sensors ...
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Pinout and Schematic 1.1 Pinout Configuration SNSK1 SNSK0 Table 1-1. Pin Listing Pin Name Type 1 SNS2 I/O 2 SNSK1 I/O 3 SNS1 I/O 4 SNSK0 I/O 5 SNS0 I/O 6 N/C – 7 N/C – 8 Vss P ...
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Schematic Figure 1-1. Typical Circuit VUNREG VREG Creg Follow regulator manufacturer's GND recommended values for input and output bypass capacitors (Creg). RL0 RL1 RL2 RL3 Example use of output pins ...
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... Adjacent Key Suppression Technology The device includes Atmel’s patented Adjacent Key Suppression (AKS) technology, to allow the use of tightly spaced keys on a keypad with no loss of selectability by the user. There is one global AKS group, implemented so that only one key in the group may be reported as being touched at any one time ...
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The use of AKS is selected by connecting a 1 M resisitor between Vdd and the SNSK0 pin (see Section 4.1 on page 8 keys can enter detect. 2.2.5 Auto Drift Compensation Signal drift can occur because of changes in ...
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... Although these resistors may be omitted, the device may become susceptible to external noise or radio frequency interference (RFI). For details on how to select these resistors refer to Application Note QTAN0002, Secrets of a Successful QTouch Design Guide, both downloadable from the Touch Technology area of Atmel’s website, www.atmel.com. 3.3 ...
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Power Supply See Section 5.2 on page 13 with temperature, the device tracks and compensates for these changes automatically with only minor changes in sensitivity. If the supply voltage drifts or shifts quickly, the drift compensation mechanism is not ...
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Detailed Operations 4.1 Adjacent Key Suppression The use of AKS is selected by the connection M resistor (RAKS resistor) between the SNSK0 pin and either Vdd (AKS mode on) or Vss (AKS mode off). Table 4-1. ...
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Figure 4-1. 4.3 Speed Selection Speed selection is determined M resistor (RFS resistor) connected between SNSK1 and either Vdd (Fast Mode) or Vss (Slow Mode). Table 4-2. RFS Connected To... Vdd Vss In Fast Mode, the device ...
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Calibration Calibration is the process by which the sensor chip assesses the background capacitance on each channel. During calibration, a number of samples are taken in quick succession to get a baseline for the channel’s reference value. Calibration takes ...
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Table 4-3. Table 4-4. Bit 7 CAL Bit 7: Bits 4 – 6: Bits 0 – 3: Figure 4-2 monitored and tweaked to the specific application with great accuracy. Figure 4-2. 9524B–AT42–04/09 Serial Data Output (Continued) Byte Purpose 18 Delta ...
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Figure 4-3. Figure 4-4. Figure 4-5. AT42QT1040 12 Byte Following Byte (~ 30 µs Period) Full Debug Send (30 Bytes) Debug Lines Floating Between Debug Data Sends (30 Bytes Send) 9524B–AT42–04/09 ...
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Specifications 5.1 Absolute Maximum Specifications Vdd Max continuous pin current, any control or drive pin Voltage forced onto any pin CAUTION: Stresses beyond those listed under Absolute Maximum Specifications may cause permanent damage to the device. This is a ...
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Timing Specifications Parameter Description T Burst duration BS Fc Burst center frequency Fm Burst modulation, percentage T Burst pulse width PW 5.5 Power Consumption Vdd (V) 1.8 3.3 5.0 AT42QT1040 14 Min Typ – 3.5 – 119 -7.5 – ...
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... Mechanical Dimensions Pin TOP VIEW Pin #1 Chamfer BOTTOM VIEW Package Drawing Contact: packagedrawings@atmel.com 9524B–AT42–04/ C0.18 (8X 0. 0.3 Ref (4x) K TITLE 20M2, 20-pad 0.85 mm Body, Lead Pitch 0.45 mm, 1.55 x 1.55 mm Exposed Pad, Thermally Enhanced Plastic Very Thin Quad Flat No Lead Package (VQFN) ...
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Marking Either of the following two markings may be used: Pin 1 ID Code Revision 1.0 Released AT42QT1040 16 Pin 1 ID 140 R1 Code Revision: 1.0 Released Program Week Code Number 1-52 Where ...
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Part Number 5.9 Moisture Sensitivity Level (MSL) Revision History Revision No. Revision A – March 2009 Revision B – April 2009 9524B–AT42–04/09 Part Number Description AT42QT1040-MMH 20-pin VQFN RoHS compliant MSL Rating Peak Body Temperature ...
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... LOSS OF INFORMATION) ARISING OUT OF THE USE OR INABILITY TO USE THIS DOCUMENT, EVEN IF ATMEL HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. Atmel makes no representations or warranties with respect to the accuracy or completeness of the contents of this document and reserves the right to make changes to specifications and product descriptions at any time without notice. Atmel does not make any commitment to update the information contained herein. Unless specifically provided otherwise, Atmel products are not suitable for, and shall not be used in, automotive applications. Atmel’ ...