AK4186 Datasheet, PDF (21/33 Pages) Asahi Kasei Microsystems – Low Power Touch Screen Controller with I2C Interface

[AK4186]
■ Power-up Sequence
CONTROL SEQUENCE
To fix the I²C interface statement, send a dummy command when first power up. After the dummy command, send a
reset command to initialize internal registers.
1
0
0
1
0
0 CAD0 R/W
Figure 23. Slave Address Construction (CAD0 is set by a pin)
1
1
1
1
1
1
1
1
Figure 24. Dummy Address Construction
1
1
1
1
1
1
1
Figure 25. Dummy Command Construction
SDA
S
T
A
R
T
S
Slave
Address
R/W= “0”
Dummy
Address
Dummy
Command
S
ST
TA
OR
PT
R/W= “0”
P
S
Slave
Address
Sub
Address
1
S
T
O
P
Reset
Command
P
Dummy Command
Reset Command
Figure 26. Power-up Sequence
MS1068-E-04
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2011/03