BU21170MUV Datasheet, PDF (16/33 Pages) Rohm – Capacitive Switch Controller IC

BU21170MUV
【0xFE : Write register for operation check of IC】
Name:
WACT
Address: 0xFE
Description: This register is a write register for operational check of the IC. This register’s value is copied to the read
register for operation check (Address is 0x1E). If the write value and the read value are equal, MPU and
I/F are operating normally.
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
Bit1
Bit0
0xFE
WACT[7:0]
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Initial val.
0
0
0
0
0
0
0
0
【0xFF : AFE Control】
Name:
CNT
Address: 0xFF
Description: This register is for controlling AFE.
ACT : Scan Enable :
This bit is the scan enable for AFE.
1 : Scan Enable. 0 : Scan Disable.
CAL : Act Soft-calibration :
The calibration is operated by setting ‘1’.
CFG : Enable Configuration Value :
Writing ‘1’ to this bit, the value of Sensor configuration (address from 0xC0 to 0xD1), Mask Configuration
(address 0xDF), Mask Interrupt of PWM continuous flashing (address = 0xEC), LED calibration (address =
0xEF), FRCRLS and CALOVF are effective to the IC’s operation.
CALMOD : Select Software-calibration mode :
0: All sensors are the targets for soft-calibration. If some sensor has the value more than the threshold for
‘OFF’ to ‘ON’, the sensors are changed to ‘OFF’, and DETECT_OFF register is enabled (default).
1: The sensors with the value more than the threshold for ‘OFF’ to ‘ON’ are not calibrated.
CALOVF : Select Self-calibration mode detected overflow :
When the periodic calibration is active, it selects whether to activate self-calibration or not to activate in the
case that the sensor values are over the dynamic range of included ADC.
0: Deactivate self-calibration (default). 1: Activate self-calibration
FRCRLS : Select Force OFF at continuous touch :
When the continuous touch is active, select whether to activate force OFF or not in the case that the max
value after detect continuous touch minus the current sensor value is more than the threshold for ‘OFF’ to
‘ON’.
0 : Deactivate force OFF (default). 1: Activate force OFF.
By force OFF is performed, the continuous touch sensor is changed to OFF, and DETECT_OFF register is
enabled.
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
Bit1
Bit0
0xFF
FRCRLS CALOVF
-
CALMOD
-
CFG
CAL
ACT
R/W
R/W
R/W
-
R/W
-
R/W
R/W
R/W
Initial val.
0
0
-
0
-
0
0
0
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TSZ22111・15・001
16/29
TSZ02201-0L5L0F300830-1-2
14.Jul.2016 Rev.002