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PDF BU21010MUV Data sheet ( Hoja de datos )
| Número de pieza | BU21010MUV | |
| Descripción | Capacitive Sensor Switch Control IC | |
| Fabricantes | ROHM Semiconductor | |
| Logotipo |  |
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Capacitive Sensor Control IC Series
Capacitive Sensor Switch
Control IC
BU21010MUV
No.09048EBT02
●Description
BU21010MUV are the capacitive sensor controller with 8 channels respectively. Half of sensor ports are available to use to
LED driver. Also gesture function can recognize the short touch, long touch and finger motion.
●Features
1) Gesture function
2) LED driver
www.Data3Sh) ee2t4wUir.ecosmerial interface
4) Power supply = 2.5V to 3.3V, I/O power supply = 1.7V to 3.3V
5) Integrated 10bit AD converter, clock and reset
6) Package VQFN016V3030
●Applications
It is possible to use it widely as a switch such as a Mobile phone, Portable equipment, and Audiovisual apparatuses.
●Absolute Maximum Ratings (Ta=25℃)
PARAMETER
APPLIED VOLTAGE
INPUT VOLTAGE
STORAGE TEMPERATURE RANGE
POWER DISSIPATION
SYMBOL
AVDD
DVDD
VAIN
VDIN
Tstg
Pd
RATING
MIN MAX
-0.3 4.5
-0.3 4.5
-0.3 AVDD + 0.3
-0.3 DVDD + 0.3
-55 125
215
UNIT
V
V
℃
mW
●Recommended Operating conditions
PARAMETER
APPLIED VOLTAGE
OPERATINGTEMPERATURE RANGE
SYMBOL
AVDD
DVDD
Topr
MIN
2.5
1.7
-40
RATING
TYP
3.0
3.0
25
MAX
3.3
3.3
85
UNIT
V
V
℃
www.rohm.com
© 2009 ROHM Co., Ltd. All rights reserved.
1/14
2009.04 - Rev.B
1 page  
BU21010MUV
●HOST I/F
・ 2 wire serial, BUS
Slave mode only
Slave Address = 5Eh
Normal （Normal mode. 100kHz Transfer rate）
Fs mode (Fast mode. 400kHz Transfer rate) also.
Not adapting sequential read / write.
【Data format】
SDA
tHD;STA
SCL
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START
Address
Read
ACK
tSU;DAT
Data
ACK
Technical Note
tHD;DAT
tSU;STO
Data
ACK
STOP
Parameter
fSCL : SCL Clock Freq
tHD;STA : START condition hold time
tLOW : SCL “L”
tHIGH : SCL “H”
tHD;DAT : Data hold time
tSU;DAT : Data setup time
tSU;STO : START condition hold time
tBUF : Free time of bus between STOP condition and START
condition
Standard mode
MIN MAX
0 100
4.0 -
4.7 -
4.0 -
0.1 3.45
0.25 -
4.0 -
4.7 -
High Speed mode
MIN MAX
0 400
0.6 -
1.3 -
0.6 -
0.1 0.9
0.1 -
0.6 -
1.3 -
Unit
kHz
μsec
μsec
μsec
μsec
μsec
μsec
μsec
【PROTOCOL】
・Write Protocol
S SLAVE ADDRESS W A
7bit = 5Eh
・Read Protocol
REGISTER
ADDRESS
8bit
S SLAVE ADDRESS W A
REGISTER
ADDRESS
7bit = 5Eh
8bit
from Master to Slave
from Slave to Master
A
WRITE DATA
AP
8bit
A S SLAVE ADDRESS R A
READ DATA
7bit = 5Eh
8bit
S = START condition
P = STOP condition
R = data direction READ (SDA HIGH)
W = data direction WRITE (SDA LOW)
A = acknowledge (SDA LOW)
N = not acknowledge (SDA HIGH)
NP
www.rohm.com
© 2009 ROHM Co., Ltd. All rights reserved.
5/14
2009.04 - Rev.B
5 Page 
BU21010MUV
Technical Note
【F7h : Button OFF→ON Threshold】
Name:
TH_ON2
Address:
F7h
Description: 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.
F7h
R/W
Initial val.
Bit7
-
-
-
Bit6
ON2[6]
W
0
Bit5
ON2[5]
W
0
Bit4
ON2[4]
W
1
Bit3
ON2[3]
W
0
Bit2
ON2[2]
W
0
Bit1
ON2[1]
W
0
Bit0
ON2[0]
W
0
【F8h : Button OFF→ON Threshold Selection】
Name:
TH_ON2_CH
Address:
F8h
Description: This register is used to relate either threshold TH_ON or TH_ON2 to particular sensor channels
for button press activity determination.
1 : TH_ON2 is applied 0 :TH_ON is applied
Bit7
www.DataShFe8eht4U.com SIN7
R/W W
Initial val.
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
【FAh: Simultaneous Press and Idle Mode Entry】
Name:
CMD
Address:
FAh
Description:
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.
1 : A level of a sensor gives priority 0 : Give priority to the channel pushed earliest
INTERMIT_EN : Intermittent and the drive are enable. ：
Whether intermittent is driven at the idol mode is selected.
1：Intermittent is driven. 0：Intermittent is not driven. Initial state：Intermittent is driven.
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.
Duration = system clock x 219 x IDLE_T (Example of system clock 1[MHz]time : About 520[msec])
FAh
R/W
Initial val.
Bit7
SIMUL_SEL
W
0
Bit6
-
-
-
Bit5 Bit4
Bit3
- INTERMIT_EN IDLE_T[3]
-W
W
-1
0
Bit2
IDLE_T[2]
W
1
Bit1
IDLE_T[1]
W
1
Bit0
IDLE_T[0]
W
1
【FBh : Gain Setting, Filter Function】
Name:
GAIN_FILTER
Address:
FBh
Description: Gain adjustment and setting of noise filter function
GAIN[2:0] : gain setting ：
It uses it for the gain adjustment in eight stages. Initial adjustment value：x1
GAIN[2:0]
000 001 010 011 100 101 110 111
Adjustment value
x 1 x 4.22 x 8.4 x 16.5 x 23 x 46 x 69 x 92
FILTER_EN : Filter enable ：
Enables/disables setting of noise filter function
1 : enabled 0 : disabled Initial state : disabled
DELTA[3:0] : Filter follow count setting ：
The follow count to which the noise filter function is effective is set.
FBh
R/W
Initial val.
Bit7
GAIN[2]
W
0
Bit6
GAIN [1]
W
0
Bit5
GAIN[0]
W
0
Bit4
FILTER_EN
W
0
Bit3
DELTA[3]
W
0
Bit2
DELTA[2]
W
0
Bit1
DELTA[1]
W
1
Bit0
DELTA[0]
W
0
www.rohm.com
© 2009 ROHM Co., Ltd. All rights reserved.
11/14
2009.04 - Rev.B
11 Page | ||
| Páginas | Total 15 Páginas | |
| PDF Descargar | [ Datasheet BU21010MUV.PDF ] | |
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