ak4183 AKM Semiconductor, Inc., ak4183 Datasheet - Page 12

• Manufacturer Part Number: ak4183
• Description: I 2 C Touch Screen Controller
• Manufacturer: AKM Semiconductor, Inc.

ASAHI KASEI
The control command, 8 bits, provided to the AK4183 via SDA, is shown in the following table. This command includes start bit,
channel selection bit, power-down bit and resolution bit. The AK4183 latches the serial command at the rising edge of SCL. Refer
to the detailed information regarding the bit order, function, the status of driver switch, ADC input as shown in Table 3.
A/D converter and power-down control of touch driver switch are determined by PD0 bit.
MS0500-E-00
Power-down Control
Control Command
S
0
1
1
1
1
1
1
1
1
BIT
6-4
7
3
2
1
0
PD0
0
1
A2
1
0
0
0
0
1
1
1
1
MODE
A2-A0
Name
PD0
X1
X2
S
Input
PENIRQN
A1
Disabled
1
0
0
1
1
0
0
1
1
Enabled
A0
1
0
1
0
1
0
1
0
1
Start Bit. “1” Accelerate and Axis Command, “0”: Sleep mode Command
Channel Selection Bits. Analog inputs to the A/D converter and the activated driver switches are
selected. Please see the following table for the detail.
Don’t care
Power down bit (refer to power-down control)
Resolution of A/D converter. “0”: 12 bit output “1”: 8 bit output
Don’t care
OFF
OFF
OFF
OFF
OFF
OFF
ON
ON
XP
Auto power-down Mode
A/D converter is automatically powered up at the start of the conversion, and goes to power-
down state automatically at the end of the conversion. All touch screen driver switches except for
YN switch are turned off and relative pins are open state. Only YN driver switch is turned ON
and YN pin is forced to the ground in this case. PEN interrupt function is enabled except for the
sampling time and conversion time.
ADC ON Mode
When X-axis or Y-axis are selected on the write operation with PD0 = “1” A/D converter and
touch panel driver are always powered up until next conversion. This mode is effective if more
settling time is required to suppress the electrical bouncing of touch plate.
PEN interrupt function is disabled and PENIRQN is forced to “L” state
Status of Driver Switch
OFF
OFF
ON
ON
ON
XN
ON
ON
ON
OFF
OFF
ON
ON
ON
ON
ON
ON
YP
Table 3 Control Command List
Table 4 Powers –Down Control
OFF
OFF
OFF
OFF
OFF
OFF
YN
ON
ON
YN (Z2)
XP (Z1)
12
ADC input (∆AIN)
AIN+
YN
YP
XP
XP
YP
XP
Function
AIN-
Function
XN
YN
XN
XN
XN
YN
XN
XN
Reference Voltage
VREF+
XP
YP
YP
YP
XP
YP
YP
YP
(∆VREF)
VREF-
XN
YN
XN
XN
XN
YN
XN
XN
Note
Sleep
Accelerate X-Driver
Accelerate Y-Driver
Accelerate Y+,
X-axis
Y-axis
Z1 (Pen Pressure)
Z2 (Pen Pressure)
X- Driver
2006/04
[AK4183]