E6240 Atmel, E6240 Datasheet - Page 16

• Manufacturer Part Number: E6240
• Description: KIT EVAL/DEV USING QT60240-ISG
• Manufacturer: Atmel
• Series: Quantum, QMatrix™r

Specifications of E6240

• Sensor Type: Touch, Capacitive
• Sensing Range: 16 / 24 Buttons/Keys
• Interface: I²C, USB
• Voltage - Supply: 5V
• Embedded: No
• Utilized Ic / Part: QT60160, QT60240
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Sensitivity: -

SDA
SCL
5.6 Combining Address and Data Packets
A transmission consists of a START condition, an SLA+R/W,
one or more data packets and a STOP condition. The
wired-ANDing of the SCL line is used to implement
handshaking between the host and the device. The device
extends the SCL low period by pulling the SCL line low
whenever it needs extra time for processing between the data
transmissions.
lQ
START
Into a Transmission
SDA from
Transmitter
SDA from
Receiver
SCL from
Master
Addr MSB
Aggregate
SDA
1
SLA+R/W
2
SLA+R/W
Addr LSB
7
Data MSB
1
R/W
Figure 5.6 Packet Transmission
8
Figure 5.5 Data Packet Format
ACK
9
2
16
Data Byte
Figure 5.6 shows a typical data transmission. Note that
several data bytes can be transmitted between the SLA +R/W
and the STOP.
Data MSB
7
1
Data LSB
2
8
Data Byte
ACK
9
7
Data LSB
QT60240-ISG R8.06/0906
8
STOP,
or
Next Data Byte
ACK
9
STOP