AK4185 AKM [Asahi Kasei Microsystems], AK4185 Datasheet - Page 14

• Manufacturer Part Number: AK4185
• Manufacturer: AKM [Asahi Kasei Microsystems]

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This command can select the touch panel and ADC conversion clock. This 8bit control command includes channel
selection, resolution, and power-down mode, and outputs in synchronization of the falling edge of SCLK after CSN = “L”.
The AK4185 latches the serial command at the rising edge of SCLK.
Refer to the control command of the AK4185 as shown in
(1) 4-wire touch panel configuration
Channel
Selection
MS0954-E-00
A2
0
0
0
0
1
1
1
1
D6-D4
Control Command
BIT
D7
D3
D2
D1
D0
A1
0
0
1
1
0
0
1
1
A0
MODE
A2-A0
0
1
0
1
0
1
0
1
Name
PD0
x1
x2
S
Status of
Driver Switch
X-Driver
XN-ON
XN-ON
OFF
OFF
OFF
OFF
D7
ON
S
-
Start Bit.
Channel Selection bit.
Resolution of A/D converter.
Don’t care
Don’t care
Power-down Mode. (reference to “
This bit must be “H” because the AK4185 initiates the command recognition.
Analog inputs to the A/D converter, the activated driver switches, and the reference voltage
are selected.
0: 12bit output
1: 8bt output
Y-Driver
YP-ON
YP-ON
D6
A2
Table 3. Command Byte definition (x1, x2: Don’t care)
OFF
OFF
OFF
OFF
ON
-
Table 5. Control Command List (4-wire)
Table 4. Control Command definition
D5
A1
ADC input
TEMP0
TEMP1
(ΔAIN)
AIN+
YN
XP
XP
YP
IN
-
D4
A0
AIN-
VSS
VSS
VSS
YN
XN
XN
XN
-
- 14 -
Table
MODE
Power-down
Reference Voltage
D3
VREF+
(ΔVREF)
VREF
VREF
VREF
4.
YP
YP
YP
XP
-
Function
D2
x1
VREF-
Control”)
VSS
VSS
VSS
YN
XN
XN
XN
-
D1
x2
Note
TEMP0
Y-axis
Setup Command
(Table
Z1 (Pressure)
Z2 (Pressure)
X-axis
AIN
TEMP1
7)
PD0
D0
Ref. Mode
[AK4185]
DFR
DFR
DFR
DFR
SER
SER
SER
2008/05
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