QT1106-ISG Ver la hoja de datos (PDF) - Quantum Research Group
Número de pieza
componentes Descripción
Fabricante
QT1106-ISG Datasheet PDF : 20 Pages
| |||
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:
Host
Byte #
1
2
3
765
CT=0 0 0
0
MOD
Resolution
Bit
43
Prox SLD
DI LPB
CalW CalK
210
AKS
Mode
Cal Key Num
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
210
000
001
010
011
100
101
AKS Option
AKS disabled (default)
AKS global
AKS keys + Wheel/Slider
AKS 4 keys1 + 3 Keys2 + Wheel/Slider
AKS 4 keys1 + (3 Keys2 + Wheel/Slider)
AKS (6 keys3 + Wheel/Slider) + key 7
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.
Mode Bits
210
000
001
010
011
100
101
110
111
Operating Mode
Free Run (default)
LP mode, 200ms1 response time (120ms2)
LP mode, 280ms1 response time (200ms2)
LP mode, 440ms1 response time (360ms2)
LP mode, 760ms1 response time (680ms2)
Sync mode
Sleep
(reserved)
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.
MOD
65
00
01
10
11
Maximum On-duration in Free Run Mode
10s (default)
20s
60s
infinite MOD - timeout disabled
Cal Key Num - key to be recalibrated when CalK=1.
Cal Key
Num Bits
210
000
001
010
011
100
101
110
111
Key
Recalibrate all keys (excluding wheel/slider)
Recalibrate Key 1
Recalibrate Key 2
Recalibrate Key 3
Recalibrate Key 4
Recalibrate Key 5
Recalibrate Key 6
Recalibrate Key 7
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
Share Link: 