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AK4160 Datasheet(PDF) 28 Page - Asahi Kasei Microsystems

Part # AK4160
Description  16-channel Capacitive Touch Sensor IC
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Manufacturer  AKM [Asahi Kasei Microsystems]
Direct Link  http://www.akm.com
Logo AKM - Asahi Kasei Microsystems

AK4160 Datasheet(HTML) 28 Page - Asahi Kasei Microsystems

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[AK4160]
MS1313-E-01
2011/11
- 28 -
Auto Calibration Control Register (ACC)
Address 0x5F (W/R) Default 0x06
Description
D7
D6
D5
D4
D3
D2
D1
D0
Auto Calibration Control
ACE
RCE
RIM
CCO
VS[3]
VS[2]
VS[1]
VS[0]
Bits
Name
Description
D7
ACE
The automatic setting of the charge current and the charge time is enabled.
The charge current and the charge time is set automatically at the first
measurement, and each register is updated. When the function of automatic
setting is valid, the VS3-0 bits must be configured.
D6
RCE
The automatic reconfiguration is enabled.
The reconfiguration is operated automatically when the measurement data is
over the upper limit.
D5
RIM
Reference value setting of the reconfiguration
0: The first measurement value is set as the initial value of the reference after
reconfiguration.
1: 31/32 of the first measurement value is set as the initial value of the reference
after reconfiguration.
D4
CCO
Automatic Setting of the Charge Current Only
The charge time is not automatically configured, and it is set to the value of CT
register. Only charge current is automatically set.
D3-D0
VS
The Lowest Operation Voltage Setting
The best charge current and charge time in the power supply voltage selected
with these bits are automatically configured.
At the power supply voltage selected by these bits, the charge current and the
charge time are automatically optimized.
The initial value is “0110”. (1.71V ~1.9V)
These bits can not be changed by the serial I/F in run-mode.
VS[3:0]
Lowest Operation
Voltage
Upper Limit Voltage of
Sense Terminals
Setting Voltage
0000-0101
Reserved
Reserved
Reserved
0110
VDD ≥ 1.71V
1.50V
1.35V
0111
VDD ≥ 1.9V
1.70V
1.53V
1000
VDD ≥ 2.1V
1.90V
1.71V
1001
VDD ≥ 2.3V
2.10V
1.89V
1010
VDD ≥ 2.5V
2.30V
2.07V
1011
VDD ≥ 2.7V
2.50V
2.25V
1100
VDD ≥ 2.9V
2.70V
2.43V
1101
VDD ≥ 3.1V
2.90V
2.61V
1110
VDD ≥ 3.3V
3.10V
2.79V
1111
VDD ≥ 3.5V
3.30V
2.97V
Table 9. Reference Value of Automatic Setting


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