at42qt2100 ATMEL Corporation, at42qt2100 Datasheet - Page 31

• Manufacturer Part Number: at42qt2100
• Description: Qtouch Touch Sensor Ic
• Manufacturer: ATMEL Corporation

Vdd = 5.0V, Cs keys = 4.7 nF, Cs slider/wheel = 15 nF; circuit of
6.4
Vdd = 5.0V, Cs keys = 4.7 nF, Cs slider/wheel = 15 nF; circuit of
6.5
Figure 6-1.
9554CX–AT42–11/11
Parameter
Data bits
Data transmission
Clock idle
Maximum clock rate
Minimum time between exchanges
Parameter
Parameter
Voh
Trst
Tdl
Tdr
Vhl
Vol
Vil
Ar
Iil
DC Specifications
SPI Bus Specifications
Data Byte Exchange – Signals
Description
Response time – LP mode
Release time – all modes
Description
Low input logic level
High input logic level
Low output voltage
High output voltage
Input leakage current
Acquisition resolution
External reset low pulse width
SCK
SAMPLE
MOSI/MISO
CHANGE
MOSI PIN
CHANGE
MISO PIN
SS
MSB
Vdd-0.5
0.7Vdd
Min
Min
Bit 6
Specification
8 data bits
Shift out on falling edge
Shift in on rising edge
Three bytes per transmission, byte 1 most significant bit sent first
Clock idle high
750 kHz
500 µs
0
2
Bit 5
Figure 1-1
Figure 1-1
Typ
280
Typ
40
14
Bit 4
0.3Vdd
Max
Max
Vdd
0.5
±1
Bit 3
Units
Units
ms
ms
bits
µA
µs
V
V
V
V
Bit 2
Notes
LP Mode 2, DI = six counts
End of touch
Notes
7 mA sink
2.5 mA source
Bit 1
AT42QT2100
LSB
31