BU21010MUV Datasheet, PDF (10/15 Pages) Rohm – Capacitive Sensor Switch Control IC

BU21010MUV
Technical Note
【F0h : Sensor Channel Setting】
Name:
SENS_CH
Address:
F0h
Description: Individual enabling and disabling of sensor channels. 1：Effective 0：Not in use
F0h
R/W
Initial val.
Bit7
SIN7
W
0
Bit6
SIN6
W
0
Bit5
SIN5
W
0
Bit4
SIN4
W
0
Bit3
SIN3
W
0
Bit2
SIN2
W
0
Bit1
SIN1
W
0
Bit0
SIN0
W
0
【F2h : LED Channel Setting】
Name:
LED_CH
Address:
F2h
Description: Enables and disables the channels to be used as LED outputs.
Valid for the 8 LED outputs.1：Effective 0：Not in use
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
Bit1
Bit0
F2h
-
-
-
-
LED3
LED2
LED1
LED0
R/W
-
-
-
-
W
W
W
W
Initial val.
-
-
-
-
0
0
0
0
【F3h : Idle Exit Condition】
Name:
IDLE_CH
Address:
F3h
Description: Defines which channels cause the device to wake up – i.e. go from idle mode to normal operation on a
key press. Selection is made on a per channel basis.
1：Effective 0：Not used
F3h
R/W
Initial val.
Bit7
SIN7
W
1
Bit6
SIN6
W
1
Bit5
SIN5
W
1
Bit4
SIN4
W
1
Bit3
SIN3
W
1
Bit2
SIN2
W
1
Bit1
SIN1
W
1
Bit0
SIN0
W
1
【F5h : LED to Sensor Linkage】
Name:
LED_LINK
Address:
F5h
Description: Allows the LED outputs to be automatically linked to the input channels without need for
any software control.
1 : It synchronizes with the button. 0 : It synchronizes with data (The register name: DLED) from host.
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
Bit1
Bit0
F5h
-
-
-
-
LED3
LED2
LED1
LED0
R/W
-
-
-
-
W
W
W
W
Initial val.
-
-
-
-
1
1
1
1
【F6h : Sampling Interval and Number of Samples Used for Button Press】
Name:
TIMES
Address:
F6h
Description: Defines the sampling interval and number of samples required to recognise as a button press.
CONT_T[3:0] : Push and hold judgment time ：
Governs how long it is before the chip decides it is push and hold. Given by the following equation:
Push-Hold Time = system clock x 2¹⁹ x CONT_T (Example: system clock 1[MHz] time : About 520[msec]).
SAMP[3:0] : Sampling Interval ：
Given by the following equation:
Sampling interval = system clock x 2¹³ x SAMP (Example: system clock 1[MHz] time : About 8.2[msec]).
F6h
R/W
Initial val.
Bit7
CONT_T[3]
W
0
Bit6
CONT_T[2]
W
0
Bit5
CONT_T[1]
W
0
Bit4
CONT_T[0]
W
0
Bit3
SAMP[3]
W
0
Bit2
SAMP[2]
W
0
Bit1
SAMP[1]
W
0
Bit0
SAMP[0]
W
0
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10/14
2009.04 - Rev.B