BU21008MUV Datasheet, PDF (10/17 Pages) Rohm – Capacitive Sensor Switch Control IC

BU21008MUV
Technical Note
【E1h : PWM Clock Setting】
Name:
FEAD_CLK
Address:
E1h
Description: This register defines the divide ratio of the clock used for PWM.
This also relates to the fade-in and fade-out time according to the following relationship.
Fead in/out =1 / ( ( Internal oscillation frequency) / ( 2 * 16 * 16 * 16 * ( F_DIV+1 ) * 16) ) [sec]
For example with an internal clock of 1.1MHz possible range is 0.119～1.906 [sec]
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
Bit1
Bit0
E1h
-
-
-
-
F_DIV[3] F_DIV[2] F_DIV[1] F_DIV[0]
R/W
-
-
-
-
W
W
W
W
Initial val.
-
-
-
-
0
1
1
1
【E2h : Gesture Clear】
Name:
GES_CLR
Address:
E2h
Description: This register when written to clears GES_VEL and GES_DIR.
It is cleared by one, and it returns to 0 by the automatic operation.
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
Bit1
Bit0
E2h
CLR
-
-
-
-
-
-
-
R/W
W
-
-
-
-
-
-
-
Initial val.
0
-
-
-
-
-
-
-
【E3h : Gesture Function Setting】
Name:
GES_CTL
Address:
E3h
Description: This register controls what key-press sequence is recognized as a gesture.
Only 4 channels may be used-SIN0, SIN2, SIN4, and SIN6.
EN : enable
These are the enable bits. One is provided for each of the 4 sense inputs used for gesture. EN[0] is for SN0, EN[1] is
for SN2, EN[2] is for SN4 and EN[3] is for SN6. 1 is to enable and 0 is for disable.
MODE : mode
0 : Requires all sensors to be present in the sequence before the gesture is recognized.(All detection mode)
1 : Allows one or more of the keys to be missed in the sequence.(Verbose mode)
The condition and the direction of detection that can be detected in each mode are as follows.
mode
All detection
Verbose
MODE
0
1
Direction(GES_DIR)
DIR_A
DIR_B
DIR_A
DIR_B
Detected
1)SIN0→SIN2→SIN4→SIN6
1)SIN6→SIN4→SIN2→SIN0
1)SIN0→SIN2→SIN4
2)SIN0→SIN2→
SIN6
3)
SIN2→SIN4→SIN6
4)SIN0→
SIN4
5)
SIN2→
SIN6
1)SIN6→SIN4→SIN2
2)SIN6→SIN4→
SIN0
3)
SIN4→SIN2→SIN0
4)SIN6→
SIN2
5)
SIN4→
SIN0
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
Bit1
Bit0
E3h
-
-
-
MODE
EN[3]
EN[2]
EN[1]
EN[0]
R/W
-
-
-
W
W
W
W
W
Initial val.
-
-
-
1
1
1
1
1
www.rohm.com
© 2009 ROHM Co., Ltd. All rights reserved.
10/16
2009.04 - Rev.B