QT60326-ASG QUANTUM ATMEL, QT60326-ASG Datasheet
QT60326-ASG
Specifications of QT60326-ASG
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QT60326-ASG Summary of contents
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... Unlike older methods, it does not require one IC per key. -40 -40 LQ Appliance controls ATM machines Outdoor keypads Touch-screens AVAILABLE OPTIONS T # Keys +105 +105 QT60326, QT60486 32 & ATRIX MOSI 1 MISO 2 SCK 3 /RST 4 QT60326 Vdd 5 QT60486 Vss 6 XT2 7 ...
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Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Overview . . . . . . . ...
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... 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. ...
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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 ...
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... Figure 2-6 Recommended Key Structure ‘T’ should ideally be similar to the complete thickness the fields need to penetrate to the touch surface. Smaller dimensions will also work but will give less signal strength doubt, make the pattern coarser. 2.8 Matrix Series Resistors The X and Y matrix scan lines should use series resistors (referred and Ry respectively) for improved EMI performance ...
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... See Figure 2-6 and page 30 for examples of key layouts. 2.10 PCB Layout, Construction It is best to place the chip near the touch keys on the same PCB reduce X and Y trace lengths, thereby reducing the chances for EMC problems. Long conn ection traces act as RF antennae ...
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... If on any sample the signal is not seen to cross the threshold level, the counter is cleared and the process has to start over from the beginning. The QT60xx6 uses a two-tier confirmation mechanism having two such counters for each key. These can be thought of as ‘ ...
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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 ...
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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 ...
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... RX7 1K RX6 1K RX5 1K RX4 RX3 1K RX2 1K RX1 1K 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 ...
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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 ...
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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 ...
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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 ...
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... Bit 2: Reports either a cal failure (failed in 5 sequential attempts) on any enabled key or, that an enabled key has a very low signal reference value, lower than the user-settable LSL value (Section 5.15). Bit 1: Set if any key is in the process of calibrating. Bit 0: Set if any key is in detection (touched). 14 QT60486-AS R8.01/0105 ...
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... 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 there are yet other keys that are also touched. The return bits are as follows: ...
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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 ...
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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 ...
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... Bit 6: 1= any of the following prevail: calibrating, key(s) failed cal 5 times, sync fail, comms error, FMEA failure, EEPROM corrupt 0..0xFF 8 Bits 5..0: indicates key number (0..47) of first key touched; reads 0x3F (63 decimal touch. 2nd return byte is CRC-8 of cmmd + return data 0..0xFF Last return byte is CRC-8 of cmmd + return data 6 bytes 0 ...
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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, ...
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... When a finger is sensed, the signal falls since the human body acts to absorb charge from the cross-coupling between X and Y lines. An isolated, untouched foreign object (a coin water film) will cause the signal to rise very slightly due to an enhancement of coupling. This is contrary to the way most capacitive sensors operate ...
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... DI counter mechanism that acts to confirm a detection by consensus (all detections in sequence must agree). The DI mechanism counts sequential detections of a key that appears to be touched, after each burst for the key. For a key to be declared touched, the DI mechanism must count to completion without even one detection failure. ...
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... AKS permits the suppression of multiple key presses based on relative signal strength. This feature assists in solving the problem of surface moisture which can bridge a key touch to an adjacent key, causing multiple key presses. This feature is also useful for panels with tightly spaced keys, where a fingertip might inadvertently activate an adjacent key ...
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... This approach results in an orderly and predictable sequencing of key scanning with predictable response times. Shorter spacings result in a faster response time to touch; longer spacings permit higher burst lengths and longer conversion times but slow down response time. ...
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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 ...
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... Some commands return bit fields related to keys. For example, command 0x07 (report all keys) returns 6 bytes containing flag bits, one per key, to indicate which keys are reporting touches. The following table shows the byte and bit order of the keys. The table contains the key number reported in each bit. ...
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... 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 (0..15), not numbers from the table. The QT uses a lookup table internally to translate 0..15 to the parameters for each function. ...
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Specifications 6.1 Absolute Maximum Electrical Specifications Operating temp ...
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... 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 0.002 0.006 - 0.047 0.012 0.018 0.031 0.031 0.315 0.315 0 7 Keys Marking 32 QT60326-AG 48 QT60486-AG QT60486-AS R8.01/0105 SQ SQ BSC BSC ...
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Appendix 7.1 8-Bit CRC Software C Algorithm // 8 bits crc calculation. Initial crc entry value must polynomial = data bit number; // repeat this ...
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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 ...
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NOTES lQ 31 QT60486-AS R8.01/0105 ...
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