qt1100a Quantum Research Group, qt1100a Datasheet - Page 39

• Manufacturer Part Number: qt1100a
• Description: 10 Key Qtouch? Sensor Ic
• Manufacturer: Quantum Research Group

5.7 QT1100A Timing Parameters - with Fosc = 12MHz
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
Parameter
Twcrdy
Twbs
Twbl
Tcyc
T3
T4
T5
T6
T7
T8
T9
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
Description
Twbs
Min
240
50
10
10
2
2
2
39
Typ
2.5
2
Twbs - Twbl
1,000
Max
100
100
10
10
4
Units
ms
ms
ms
µs
µs
µs
µs
µs
µs
µs
µs
Copyright © 2003-2005 QRG Ltd
QT1100A-ISG R3.02/1105
Notes
2, 3
1
4
5