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AT42QT1111-AU Datasheet(PDF) 38 Page - ATMEL Corporation

Part # AT42QT1111-AU
Description  11-key QTouch Touch Sensor IC
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Manufacturer  ATMEL [ATMEL Corporation]
Direct Link  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

AT42QT1111-AU Datasheet(HTML) 38 Page - ATMEL Corporation

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AT42QT1111-MU / AT42QT1111-AU [DATASHEET]
9571C–AT42–05/2013
8.4
Timing Specifications
8.5
SPI Bus Specifications
8.5.1
General Specifications
8.5.2
Full SPI Mode
Parameter
Description
Min
Typ
Max
Units
Notes
TBS
Burst duration
6
ms
4.7 nF Cs / parallel
acquisition
Fc
Burst center frequency
40
kHz
Fm
Burst modulation, percentage
18
%
TPW
Pulse width
9000
ns
Parameter
Specification
Address space
8-bit
Maximum clock rate
750 KHz
Minimum low clock period
666 ns
Minimum high clock period
666 ns
Clock idle
High
Setup on
Leading (falling) edge
Clock out on
Trailing (rising) edge
SPI Enable delay (SS low to SCK low)
1 µs minimum
Parameter
Specification
Minimum time between bytes
300 µs
Minimum time between communications
Generally 300 µs; longer delays required to implement some commands, as follows:
Send Setups: 300 µs after all setup bytes are returned
Calibrate All: 300 µs
Calibrate Key: 300 µs
Reset: 320 ms
Sleep: 300 µs after a low signal is applied to SS or CHANGE to wake the
device
Store to EEPROM: 200 ms
Restore from EEPROM: 150 ms
Erase EEPROM: 50 ms
Recover EEPROM: 50 ms


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