qt60160 Quantum Research Group, qt60160 Datasheet - Page 16

• Manufacturer Part Number: qt60160
• Description: 16 And 24 Key Qmatrix Touch Sensor Ics Research Group
• Manufacturer: Quantum Research Group

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.

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
8
Figure 5.6 Packet Transmission
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