BU21010MUV-E2 Rohm Semiconductor, BU21010MUV-E2 Datasheet - Page 11

• Manufacturer Part Number: BU21010MUV-E2
• Description: IC CTLR CAP SENSOR 8CH 16VQFN
• Manufacturer: Rohm Semiconductor
• Type: Capacitive Sensor Controllerr

Specifications of BU21010MUV-E2

• Input Type: Logic
• Output Type: Logic
• Interface: 2-Wire Serial
• Current - Supply: 300µA
• Mounting Type: Surface Mount
• Package / Case: 16-VQFN
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

© 2009 ROHM Co., Ltd. All rights reserved.
BU21010MUV
www.rohm.com
【F7h : Button OFF→ON Threshold】
【F8h : Button OFF→ON Threshold Selection】
【FAh: Simultaneous Press and Idle Mode Entry】
【FBh : Gain Setting, Filter Function】
Initial val.
Initial val.
Initial val.
Initial val.
Name:
Address:
Description:
Name:
Address:
Description:
Name:
Address:
Description:
Name:
Address:
Description:
R/W
R/W
R/W
F7h
F8h
FBh
R/W
FAh
SIMUL_SEL : Simultaneous push judgment element choice ：
In the case of simultaneous key press a decision must be made to select the dominant channel. The chip allows for two
alternative methods. Either it can be based on whichever key press was first, or the priority can be based on the highest
signal level.
INTERMIT_EN : Intermittent and the drive are enable. ：
Whether intermittent is driven at the idol mode is selected.
IDLE_T[3:0] : non-detect time-out setting ：
This sets the time the chip takes to go from normal mode to idle mode in a period key inactivity.
DELTA[3:0] : Filter follow count setting ：
The follow count to which the noise filter function is effective is set.
GAIN[2:0] : gain setting ：
It uses it for the gain adjustment in eight stages. Initial adjustment value：x1
FILTER_EN : Filter enable ：
Enables/disables setting of noise filter function
1 : A level of a sensor gives priority
1：Intermittent is driven. 0：Intermittent is not driven. Initial state：Intermittent is driven.
Duration = system clock x 2
1 : enabled 0 : disabled Initial state : disabled
Adjustment value
SIMUL_SEL
GAIN[2]
SIN7
GAIN[2:0]
A second threshold value for determining a button off→on judgment of sensor.
The sensor output value of 8bit (register SENS_DATA) is compared with
128+ ON2 [6:0], and if it is larger, the button is determined active.
This register is used to relate either threshold TH_ON or TH_ON2 to particular sensor channels
1 : TH_ON2 is applied 0 :TH_ON is applied
Bit7
Bit7
Bit7
TH_ON2
F7h
TH_ON2_CH
F8h
CMD
FAh
GAIN_FILTER
FBh
W
W
for button press activity determination.
Gain adjustment and setting of noise filter function
0
Bit7
0
-
-
-
W
0
GAIN [1]
ON2[6]
SIN6
Bit6
Bit6
Bit6
Bit6
W
W
W
0
0
0
-
-
-
19
x IDLE_T (Example of system clock 1[MHz]time : About 520[msec])
000
x 1
Bit5
-
-
-
GAIN[0]
ON2[5]
SIN5
Bit5
Bit5
Bit5
W
W
W
0
0
0
x 4.22
0 : Give priority to the channel pushed earliest
INTERMIT_EN
001
Bit4
FILTER_EN
W
1
ON2[4]
SIN4
Bit4
Bit4
11/14
Bit4
W
W
x 8.4
1
0
010
W
0
IDLE_T[3]
x 16.5
ON2[3]
DELTA[3]
011
Bit3
SIN3
Bit3
Bit3
W
0
W
W
0
0
Bit3
W
0
x 23
100
ON2[2]
DELTA[2]
IDLE_T[2]
SIN2
Bit2
Bit2
W
W
0
0
Bit2
Bit2
W
0
W
1
x 46
101
ON2[1]
DELTA[1]
SIN1
x 69
110
Bit1
Bit1
W
W
0
0
Bit1
IDLE_T[1]
W
1
Bit1
W
1
2009.04 - Rev.B
Technical Note
x 92
111
ON2[0]
DELTA[0]
SIN0
Bit0
Bit0
W
W
0
0
Bit0
W
0
IDLE_T[0]
Bit0
W
1