ak4181a AKM Semiconductor, Inc., ak4181a Datasheet - Page 11

• Manufacturer Part Number: ak4181a
• Description: Touch Screen Controller
• Manufacturer: AKM Semiconductor, Inc.

ASAHI KASEI
The control command, 8 bits, provided to the AK4181A via DIN is shown in the following table. This command includes start bit,
channel selection, resolution, measurement configuration, and power-down mode. The AK4181A latches the serial command at
the rising edge of DCLK. Table 2 gives detailed information regarding the bit order, function, the status of driver switch, ADC
input, reference voltage.
Note 6. Note that IN2 auxiliary input is measured by single-ended mode although SER/ DFR bit is “0”.
MS0313-E-00
A2
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
BIT
6-4
Control Command
7
3
2
3
D7
S
Control Command
A1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
SER/ DFR
PD1-PD0
MODE
A2-A0
Name
A0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
S
D6
A2
DFR
SER/
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
Channel Selection Bits. Analog inputs to the A/D converter and the activated driver switches are
Start Bit. This bit must be “H” because the AK4181A initiates the command recognition
selected. Please see the following table for the detail.
Resolution of A/D converter. ”L”: 12 bit output “H”: 8 bit output
Measurement Mode (Single-Ended/Differential)
Power-down Mode (reference to “ Power-down Control”)
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
ON
ON
XP
Status of Driver Switch
D5
A1
OFF
OFF
OFF
OFF
OFF
OFF
OFF
XN
ON
ON
ON
ON
ON
ON
OFF
OFF
OFF
OFF
OFF
OFF
OFF
Table 2 Control Command List
ON
ON
ON
ON
ON
ON
YP
D4
A0
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
YN
ON
ON
11
TEMP0
YN(Z2)
TEMP1
YN(Z2)
ADC input (∆AIN)
XP(Z1)
XP(Z1)
VBAT
AIN+
IN1
IN2
XP
YP
XP
YP
MODE
D3
Function
GND
GND
GND
GND
GND
GND
GND
GND
GND
AIN-
YN
XN
XN
XN
SER/ DFR
D2
VREF+
Reference Voltage
VREF
VREF
VREF
VREF
VREF
VREF
VREF
VREF
VREF
YP
YP
YP
XP
(∆VREF)
VREF-
GND
GND
GND
GND
GND
GND
GND
GND
GND
YN
XN
XN
XN
PD1
D1
TEMP1
Note
TEMP0
Y-axis
Battery Monitor
Z1 (Pen Pressure)
Z2 (Pen Pressure)
X-axis
IN1
NA
Y-axis
NA
Z1 (Pen Pressure)
Z2 (Pen Pressure)
X-axis
IN2 (Note 6)
NA
[AK4181A]
2004/06
PD0
D0