QT1100A Datasheet, PDF (39/42 Pages) Quantum Research Group – 10 KEY QTOUCH SENSOR IC

5.7 QT1100A Timing Parameters - with Fosc = 12MHz
Parameter
Twcrdy
Twbl
Twbs
T3
T4
T5
T6
T7
T8
T9
Tcyc
Description
CRDY high (ready to communicate)
Acquisition burst length
Burst spacing time
Burst to CRDY delay
CRDY to /SS max delay (grace period)
/SS to CLK duration
/SS high min recovery time
Setup time, DI to CLK
Hold time, CLK to DI
Delay time, CLK to DO
CLK period
Min
240
2
50
10
Twbs
2
2
10
Typ
2.5
2
Max
Twbs - Twbl
10
100
10
100
4
1,000
Units
µs
ms
ms
µs
µs
µs
ms
µs
µs
µs
µs
Notes
1
2, 3
4
5
Note 1: Twcrdy can last from the end of a burst until the completion of the inter-burst dead-time, i .e. just before the next channel’s burst.
Note 2: Burst spacing will be expanded if the burst time + burst processing time is longer.
Note 3: This setting is determined by Setups, or defaults to 3ms
Note 4: Min time that DI pin must be valid prior to CLK going high
Note 5: 100kHz max clock rate
LQ
39
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QT1100A-ISG R3.02/1105