ak4182a AKM Semiconductor, Inc., ak4182a Datasheet - Page 11

• Manufacturer Part Number: ak4182a
• Description: Touch Screen Controller
• Manufacturer: AKM Semiconductor, Inc.

ASAHI KASEI
■
full scale level of digital I/O voltage is specified IOVDD.
■
The control command, 8 bits, provided to the AK4182A via DIN is shown in the following table. This command includes start bit,
channel selection, resolution, measurement configuration, and power-down mode. The AK4182A latches the serial command at
the rising edge of DCLK. Refer to the detailed information regarding the bit order, function, the status of driver switch, ADC input,
reference voltage as shown in
MS0482-E-01
A2
The digital I/O of the AK4182A can operate from 1.5V IOVDD. This allows connecting the low –voltage microprocessor. The
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
BIT
6-4
Digital I/F
Control Command
7
3
2
3
D7
Control Command
S
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
Start Bit. This bit must be “H” because the AK4182A initiates the command recognition
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.
Resolution of A/D converter. “L”: 12 bit output “H”: 8 bit output
Measurement Mode (Single-Ended/Differential)
Power-down Mode (reference to “
Table
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
ON
ON
XP
2.
Status of Driver Switch
D5
A1
AK4182A
OFF
OFF
OFF
OFF
OFF
OFF
XN
ON
ON
ON
ON
ON
ON
VCC=2.2V – 3.6V
Table 2 Control Command List
OFF
OFF
OFF
OFF
OFF
OFF
ON
ON
ON
ON
ON
ON
YP
D4
A0
Figure6 Digital I/F
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
YN
ON
ON
DCLK
SDIN
SDOUT
BUSY
IOVDD
Power-down
11
TEMP0
YN(Z2)
TEMP1
YN(Z2)
XP(Z1)
XP(Z1)
ADC input ( Δ AIN)
VBAT
AIN+
XP
YP
XP
YP
IN
MODE
IOVDD=1.5V – VCC
D3
Function
Control” )
Processor
AIN-
GND
GND
GND
GND
GND
GND
GND
GND
XN
XN
YN
XN
Micro-
SER/ DFR
D2
VREF+
Reference Voltage
VREF
VREF
VREF
VREF
VREF
VREF
VREF
VREF
YP
YP
YP
XP
( Δ VREF)
VREF-
GND
GND
GND
GND
GND
GND
GND
GND
YN
XN
XN
XN
PD1
D1
Note
TEMP0
Y-axis
Battery Monitor
Z1 (Pen Pressure)
Z2 (Pen Pressure)
X-axis
IN
TEMP1
NA
Y-axis
NA
Z1 (Pen Pressure)
Z2 (Pen Pressure)
X-axis
Sleep mode
NA
[AK4182A]
2006/12
PD0
D0