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AT42QT2100 Datasheet(PDF) 21 Page - ATMEL Corporation |
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AT42QT2100 Datasheet(HTML) 21 Page - ATMEL Corporation |
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21 / 44 page  21 AT42QT2100 [DATASHEET] 9554E–AT42–01/13 LPB – Sets the LP mode following burst option. See Figure 4-2 on page 14. LPB = 0: If the host communicates with the device, or there is an SS pulse during any LP mode (modes 001 to 100), there will be no following burst. The only bursts that will take place are those that occur as naturally defined by the LP mode noted above. LPB = 1: If the host communicates with the device, or there is an SS pulse during any LP mode (modes 001 to 100), there will be an additional burst following SS raising high (default). In modes 101 (Sync) and 110 (Sleep), there will always be a burst following SS raising high, regardless of the LPB Setting. See Table 5-3 for a description of the Mode settings. DI - Set the Detect Integrator noise filter function. DI = 0: Two detections required to confirm a touch (faster but less noise immune). DI = 1: Six detections required to confirm a touch (slower but more noise immune; appropriate for most applications) (default). MOD (Recal Time) – Sets the Maximum On-duration for all keys and slider/wheel. Controls the time from the start of a detection to automatic recalibration of all channels. See Table 5-4 for allowed MOD times. Note: in Sleep mode, all device timing is dependent on the regularity of SPI communications. See Section 4.4.4 on page 17 for more information. 101 Sync mode: The QT2100 performs an acquisition burst when triggered by a rising edge on SS and ‘heartbeat’ bursts at the same interval as LP Mode 4 110 Sleep: The QT2100 performs an acquisition and processing cycle only when triggered by a rising edge on SS, whether a low pulse or a communication exchange. 111 Reserved Table 5-4. Maximum On-duration in Free Run Mode MOD Bits Maximum On-duration 00 10 s (default) 01 20 s 10 60 s 11 Infinite MOD – timeout disabled Table 5-3. Sleep/Low Power Modes (Continued) LP Mode Bits Operating Mode |
Similar Part No. - AT42QT2100_14 |
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Similar Description - AT42QT2100_14 |
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