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| AK4160 Datasheet, PDF (28/40 Pages) Asahi Kasei Microsystems – 16-channel Capacitive Touch Sensor IC | |||
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[AK4160]
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 â0110â. (1.71V ~1.9V)
These bits can not be changed by the serial I/F in run-mode.
VS[3:0]
0000-0101
0110
0111
1000
1001
1010
1011
1100
1101
1110
1111
Lowest Operation Upper Limit Voltage of
Voltage
Sense Terminals
Reserved
Reserved
VDD ⥠1.71V
1.50V
VDD ⥠1.9V
1.70V
VDD ⥠2.1V
1.90V
VDD ⥠2.3V
2.10V
VDD ⥠2.5V
2.30V
VDD ⥠2.7V
2.50V
VDD ⥠2.9V
2.70V
VDD ⥠3.1V
2.90V
VDD ⥠3.3V
3.10V
VDD ⥠3.5V
3.30V
Table 9. Reference Value of Automatic Setting
Setting Voltage
Reserved
1.35V
1.53V
1.71V
1.89V
2.07V
2.25V
2.43V
2.61V
2.79V
2.97V
MS1313-E-01
- 28 -
2011/11
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