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QT1106-ISG Datasheet(PDF) 9 Page - Quantum Research Group |
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QT1106-ISG Datasheet(HTML) 9 Page - Quantum Research Group |
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9 / 20 page  3.5 SPI Host Commands 3.5.1 Overview The command from the host consists of three bytes, #1, #2 and #3. These three bytes contain operation mode settings which must be transmitted every time. The setting information in these three bytes becomes effective immediately after all three are received by the QT1106. The response to these three bytes are three data bytes containing key detection information. A downloadable host-driver software example for controlling the QT1106 can be found on the Quantum website at http://www.qprox.com/toolbox/1106. There are two command modes, selectable through bit CT. CT - Custom threshold: Selects between normal command bytes and custom threshold commands. CT=0: Normal commands. CT=1: Custom Threshold commands. 3.5.2 Normal Command Mode When CT=0, the three host command bytes should contain the following bits: Cal Key Num CalK CalW Resolution 3 Mode LPB DI MOD 0 2 AKS SLD Prox 0 0 CT=0 1 0 1 2 3 4 5 6 7 Bit Host Byte # Bits labelled ‘0’ should not be altered. The bits used in these three bytes are defined as follows: AKS - Three bits used to determine the AKS mode. See Section 2.4 for further information. AKS (6 keys3 + Wheel/Slider) + key 7 1 0 1 AKS 4 keys1 + (3 Keys2 + Wheel/Slider) 0 0 1 AKS 4 keys1 + 3 Keys2 + Wheel/Slider 1 1 0 AKS keys + Wheel/Slider 0 1 0 AKS global 1 0 0 AKS disabled (default) 0 0 0 0 1 2 AKS Option AKS 1 keys 1-4 AKS’d together 2 keys 5-7 AKS’d together 3 keys 1-6 AKS’d together SLD - Scrolling device type selection. SLD=0: Wheel mode (default) SLD=1: Linear slider mode. Prox - Key 7 QMagic Proximity mode. See Section 2.6 for further information. Prox=0: Key 7 is a normal key (default) Prox=1: Key 7 is a proximity sensor. Note: Once activated, Key 7 will be in QMagic Proximity mode until a reset occurs. Mode - These bits determine the Sleep / Low Power modes the device runs in. (reserved) 1 1 1 Sleep 0 1 1 Sync mode 1 0 1 LP mode, 760ms1 response time (680ms2) 0 0 1 LP mode, 440ms1 response time (360ms2) 1 1 0 LP mode, 280ms1 response time (200ms2) 0 1 0 LP mode, 200ms1 response time (120ms2) 1 0 0 Free Run (default) 0 0 0 0 1 2 Operating Mode Mode Bits 1 response times are estimated using a DI of six counts. 2 response times are estimated using a DI of two counts. LPB- Sets the LP mode ‘following burst’ option. See Figures 4.1 and 4.2. 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) 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. Controls the time from the start of a key detection to when the key is automatically recalibrated . See Table 2.1 for MOD times in other operating modes. infinite MOD - timeout disabled 1 1 60s 0 1 20s 1 0 10s (default) 0 0 5 6 Maximum On-duration in Free Run Mode MOD Cal Key Num - key to be recalibrated when CalK=1. Recalibrate Key 7 1 1 1 Recalibrate Key 6 0 1 1 Recalibrate Key 5 1 0 1 Recalibrate Key 4 0 0 1 Recalibrate Key 3 1 1 0 Recalibrate Key 2 0 1 0 Recalibrate Key 1 1 0 0 Recalibrate all keys (excluding wheel/slider) 0 0 0 0 1 2 Key Cal Key Num Bits CalK - Recalibrates the key(s) specified by Cal Key Num. CalK=0: No recalibration (normal state of this bit) . CalK=1: The device recalibrates key(s). CalW - Recalibrates the wheel/slider. CalW=0: No recalibration (normal state of this bit). CalW=1: The device recalibrates the wheel/slider. Lq 9 QT1106-ISG R8I.05/0906 |
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