AT42QT2100-AU Datasheet, PDF (33/44 Pages) ATMEL Corporation – QTouch Touch Sensor IC

Figure 6-2. Data Byte Exchange – Timings
SS must be held
low between
bytes of an
exchange.
Period
Min Max Unit
SS Low to SCK – Free-run mode 2
–
µs
SS Low to SCK – LP mode
22
–
µs
S2 SCK to SS High
20
–
µs
S3 SCK Low Pulse
666
–
ns
S4 SCK High Pulse
666
–
ns
S5 SCK Period
S6 Between Bytes
–
ns
S1
–
µs
S7 SS High to Tristate
–
20
ns
General
Rise/Fall Time
Setup
Hold
Min Max Unit
– 1600 ns
10
–
ns
333
–
ns
6.6 External Reset
Parameter
V_RST
Description
Threshold voltage low (Activate)
Threshold voltage high (Release)
Operation
0.2 × Vdd
0.9 × Vdd
6.7 Internal Resonator
Parameter
Internal RC oscillator
Operation
8 MHz with spread-spectrum modifier during measurement
bursts, if enabled
AT42QT2100 [DATASHEET]
33
9554E–AT42–01/13