qt60326-as-g Quantum Research Group, qt60326-as-g Datasheet
qt60326-as-g
Related parts for qt60326-as-g
qt60326-as-g Summary of contents
Page 1
... QT60326 Vdd 5 QT60486 Vss 6 XT2 7 TQFP-44 XT1 Automotive panels Machine tools Part Number QT60326-AS-G QT60486-AS-G Copyright © 2003-2005 QRG Ltd QT60486-AS R8.01/0105 ™ Y3B 32 Y2B 31 Y1B 30 Y0B 29 Vdd 28 Vss 27 Vdd ...
Page 2
Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Overview . . . . . . . ...
Page 3
... QT60326. On the QT60326, only the first 4 Y lines (Y0..Y3) are operational by default. On the QT60326, to use keys located on lines Y4 and Y5, one or more of the pre-enabled keys must be disabled simultaneously while enabling the desired new keys. This can be done in one Setups block load operation. ...
Page 4
Response Time The response time of the device depends on the scan rate of the keys (Section 5.13), the number of keys enabled (Section 5.4), the detect integrator settings (Section 5.4), and the serial polling rate by the host ...
Page 5
Figure 2-4 X-Drive Pulse Roll-off and Dwell Time Lost charge due to X drive inadequate settling before end of dwell time Dwell time Y gate Figure 2-5 Probing X-Drive Waveforms with a Coin 2.7 Signal Levels Using Quantum’s QmBtn™ software ...
Page 6
Only one key along a particular X line needs to be observed, as each of the keys along that X line will be identical. The chosen dwell time should exceed the observed 95% settling of the X-pulse by 25% ...
Page 7
Table 2-1 Calibration Timings Burst Spacing, Cal Time, ms keys *Auto see text 0.50 280 0.75 387 1.00 495 1.25 602 1.50 709 1.75 816 2.00 923 2.25 1031 2.50 1138 2.75 1245 3.00 1352 To the above, ...
Page 8
FMEA error flags are cleared. Any FMEA errors will be reported as the tests are performed for the first time. The FMEA testing is done on all enabled keys in the matrix, and results are reported via the serial interface ...
Page 9
Wiring Table 2.2 - Pin Listing Applies to all devices Pin Function 1 MOSI 2 MISO 3 SCK 4 /RST 5 Vdd 6 Vss 7 XT2 8 XT1 SMP 13 Y3A 14 ...
Page 10
... RX0 RY0 CS0 4.7nF RY1 CS1 4.7nF RY2 CS2 4.7nF RY3 CS3 4.7nF RY4 CS4 4.7nF RY5 CS5 4.7nF Note 1: Leave Y4A, Y4B, Y5A, Y5B unconnected for QT60326 RS3 RS2 RS1 RS0 QT60486-AS R8.01/0105 ...
Page 11
Serial Communications These devices can use either SPI or UART communications modes; it cannot use both at the same time. The part defaults to SPI mode unless it receives a byte over the UART interface UART byte ...
Page 12
SPI communications operates in slave mode only, and obeys DRDY control signaling. The clocking is as follows: Clock idle: High Clock shift out edge: Falling Clock data in edge: Rising Max clock rate: 4MHz SPI mode requires 5 signals to ...
Page 13
Multi-drop capability: Tx floats within 10µs after each transmitted byte. This line can thus be shared with other UART based peripherals. Tx includes an internal 20K ~ 50K pull-up resistor to Vdd to prevent the line from floating down. Wake ...
Page 14
In SPI communications, when the QT60xx6 responds to a command with one or more response bytes, the host can issue a new command instead of a null on the last byte shift operation. New commands during intermediate byte shift-out operations ...
Page 15
A CRC byte is appended to the response to the 0x05 command; this CRC folds in the command value 0x05 itself initially. 4.6 Report 1st Key - 0x06 Reports the first or only key to be touched, plus indicates if ...
Page 16
This command requires substantial amounts of time to process and return a result not recommended to use this command except perhaps on startup or very infrequently. Command response timing: The response to this command can take as long ...
Page 17
Power On or Hardware Reset Note: CRC errors or incorrect responses should cause each transmission to retry where changes are specifically required, such as for sensiti vity, timing, or AKS changes. The circles in this drawing are communications interchanges between ...
Page 18
Table 4.2 Command Summary Hex Name Description Null command Used to get data back in SPI mode 0x00 Enter Setups, stop sensing; followed by block load of binary Setups of length ‘nn’. Command must be repeated 2x consecutively without any ...
Page 19
Hex Name Description References for all Sends back all key reference levels 0x09 0x0a Deltas for all Sends back all key delta signals from ref 0x0b Error flags for all Error bit fields 0x0c FMEA status FMEA bitfield on X, ...
Page 20
Setups 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 be user-selected ...
Page 21
In this latter case, the sensor should compensate for the object's removal by raising ...
Page 22
PTHR continuously for the PRD period. After the PRD interval has expired and the auto- recalibration has taken place, the affected key will once again function normally. PRD is set on a per-key basis. The functioning of ...
Page 23
External fields can cause interference leading to false detections or sensitivity shifts. Most fields come from AC power sources. RFI noise sources are heavily suppressed by the low impedance nature of the QT circuitry itself. Noise such as from 50Hz ...
Page 24
Block Table 5.1 Setu Setups data is sent from the host to the block of hex data. The block can only be loaded in Setups mode following two 0x 01 commands (page 14). The devices this ...
Page 25
Table 5.2 LED Function Control Byte Bits See also page 23. The LED pin can be used to indicate a variety of things in combination. The LED control byte controls which states make the LED pin active. The active state ...
Page 26
Table 5.4 Setups Block Summary Typical values: For most touch applicatio ns, 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 ...
Page 27
Specifications 6.1 Absolute Maximum Electrical Specifications Operating temp ...
Page 28
... E Package Type: 44 Pin TQFP Millimeters Min Max Notes 9.90 10.10 SQ 11.75 12.21 SQ 0.09 0.20 0.45 0.75 0.05 0.15 - 1.20 0.30 0.45 0.80 0.80 BSC 8.00 8.00 BSC 0 7 TQFP Part T Number QT60326-AS QT60486-AS Inches Min Max Notes 0.386 0.394 0.458 0.478 0.003 0.008 0.018 0.030 ...
Page 29
Appendix 7.1 8-Bit CRC Software C Algorithm // 8 bits crc calculation. Initial crc entry value must polynomial = data bit number; // repeat this ...
Page 30
Key Layout This key design can be made on a 1-sided SMT PCB. A single 0-ohm jumper allows the wiring to be done on a single side with full pass-through of X and Y traces to allow matrix ...
Page 31
NOTES lQ 31 QT60486-AS R8.01/0105 ...
Page 32
Tel: +44 (0)23 8056 5600 Fax: +44 (0)23 8045 3939 The specifications set out in this document are subject to change without notice. All products sold and services supplied by QRG are subject to our Terms and Conditions of ...