AT42QT1110-MU Datasheet, PDF (39/48 Pages) ATMEL Corporation – QTouch™ 11-key Sensor IC

8.5 SPI Bus Specifications
8.5.1 General Specifications
Parameter
Address space
Maximum clock rate
Minimum low clock period
Minimum high clock period
Clock idle
Setup on
Clock out on
SPI Enable delay (SS low to SCK low)
8.5.2 Full SPI Mode
Parameter
Time between bytes
Time between communications
8.5.3 Quick SPI Mode
Parameter
Time between bytes
Time between communications
AT42QT1110-MU/AT42QT1110-AU
Specification
8-bit
1.5 MHz
333 ns
333 ns
High
Leading (falling) edge
Trailing (rising) edge
1 µs
Specification
150 µs
Generally 150 µs; longer delays required to implement some commands, as follows:
• Send Setups: 150 µs after all setup bytes are returned
• Calibrate All: 150 µs
• Calibrate Key: 150 µs
• Reset: 160 ms
• Sleep: 150 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
Specification
50 µs
Generally 50 µs, except for the following:
• Store to EEPROM: 200 ms
• Switch to Full SPI: 150 µs
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