BU21170MUV Datasheet, PDF (10/33 Pages) Rohm – Capacitive Switch Controller IC

BU21170MUV
【0xC0-0xCE : Sensor Settings】
Name:
SIN_CFG
Address: 0xC0 – 0xCE
Description: These registers are for setting of each SIN sensor.
The settings are the thresholds (from On to Off, and from Off to On), the gain and the mask function of the
each switch operation (On / Off / Continuous touch).
GAIN_SIN*[3:0] : Setting for the gain :
This register is for setting the gain of AFE. The smaller the value of this register is, the higher the gain is.
Adjustment range : 0x1 ≤ GAIN_SIN ≤ 0xF
The sensor which setting value is 0 has no switch function.
ON_TH_SIN*[7:0] : The threshold from Off to On :
This register is the threshold from Off to On. This value is compared to the register SIN_DATA. If the value
of this register is larger than SIN_DATA, the On operation is detected.
OFF_TH_SIN*[7:0] : The threshold from On to Off :
This register is the threshold from On to Off. This value is compared to the register SIN_DATA. If the value
of this register is smaller than SIN_DATA, the Off operation is detected.
Adjustment range : 0x00 < OFF_SIN* < ON_SIN* < 0xFF
The sensor which setting value is out of this range is unusable for switch operation.
MSK_ON_SIN*, MSK_OFF_SIN*, MSK_CONT_SIN* : Mask for the switch operation :
This register is the mask function of the each switch operation (On / Off / Continuous touch).
If the mask function is enabled, the register for detection of switch operation is disabled.
1 : Mask function is enable. 0 : Mask function is disable (default).
0xC0
0xC1
0xC2
0xC3
0xC4
0xC5
0xC6
0xC7
0xC8
0xC9
0xCA
0xCB
0xCC
0xCD
0xCE
R/W
Initial val.
Bit7
-
-
-
-
-
R/W
0
Bit6
MSK_CONT_SIN0
MSK_CONT_SIN1
MSK_CONT_SIN2
MSK_CONT_SIN3
MSK_CONT_SIN4
R/W
0
Bit5
MSK_OFF_SIN0
MSK_OFF_SIN1
MSK_OFF_SIN2
MSK_OFF_SIN3
MSK_OFF_SIN4
R/W
0
Bit4
Bit3
MSK_ON_SIN0
ON_TH_SIN0[7:0]
OFF_TH_SIN0[7:0]
MSK_ON_SIN1
ON_TH_SIN1[7:0]
OFF_TH_SIN1[7:0]
MSK_ON_SIN2
ON_TH_SIN2[7:0]
OFF_TH_SIN2[7:0]
MSK_ON_SIN3
ON_TH_SIN3[7:0]
OFF_TH_SIN3[7:0]
MSK_ON_SIN4
ON_TH_SIN4[7:0]
OFF_TH_SIN4[7:0]
R/W
R/W
0
0
Bit2
Bit1
GAIN_SIN0[3:0]
GAIN_SIN1[3:0]
GAIN_SIN2[3:0]
GAIN_SIN3[3:0]
GAIN_SIN4[3:0]
R/W
R/W
0
0
Bit0
R/W
0
【0xCF :Monitor activity of the sensor】
Name:
MONI_ACT
Address: 0xCF
Description: This register is used to select whether to monitor the register ACT (scan enable bit at the address 0xFF).
The monitor’s purpose is to prevent erroneous stop of detection of the AFE.
If the state that the AFE scan is stopped in the case that the monitor function is enabled is detected, the
AFE scan will be self-restarted.
Monitor function is executed about 300 msec.
1 : Monitor function is enabled. 0 : Monitor function is disabled (default).
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
Bit1
Bit0
0xCF
-
-
-
-
-
-
-
MONI_ACT
R/W
-
-
-
-
-
-
-
R/W
Initial val.
0
0
0
0
0
0
0
0
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TSZ22111・15・001
10/29
TSZ02201-0L5L0F300830-1-2
14.Jul.2016 Rev.002