AK4186 Datasheet, PDF (16/33 Pages) Asahi Kasei Microsystems – Low Power Touch Screen Controller with I2C Interface

[AK4186]
■ System Reset
Upon power-up, the AK4186 must be reset by writing the reset command. (Refer to the “■ Power-up Sequence” for
details) This ensures that all internal register reset to their initial values (00H) and set the channel to X-axis (auto driver
= OFF). The System reset can also stop a sequential measurement forcibly, but all data will be cleared.
SDA
S
T
A
R/W= “0”
R
T
S
Slave
Address
Sub
Address
S
T
O
P
Reset
Com man d
P
Figure 19. Data Transfer Sequence at the System Reset
1
0
0
1
0
0 CAD0 R/W
(Those CAD1/0 should match with CAD1/0 pins.)
Figure 20. The First Byte
0
0
0
0
0
0
0
0
Figure 21. The Second Byte
0
0
0
0
0
0
0
1
Figure 22. Byte Structure at Reset Command
■ Setup Function of Touch Panel
1. Setup Command Configuration
Addr Register Name
D7
D6
D5
D4
D3
D2
D1
D0
01H Setup Command PANEL
0
SLEEP1 SLEEP0
0
0
0
PD0
Table 6. Setup Command Register Format
MS1068-E-04
- 16 -
2011/03