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PDF BU21008MUV Data sheet ( Hoja de datos )
| Número de pieza | BU21008MUV | |
| Descripción | Capacitive Sensor Switch Control IC | |
| Fabricantes | ROHM Semiconductor | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de BU21008MUV (archivo pdf) en la parte inferior de esta página. Total 17 Páginas | ||
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Capacitive Sensor Control IC Series
Capacitive Sensor Switch
Control IC
BU21008MUV
No.09048EBT04
●Description
BU21008MUV are the capacitive sensor controller with 16 channels respectively. Half of sensor ports are available to use to
LED driver with PWM function. PWM function can control light ambient. Also gesture function can recognize the short touch,
long touch and finger motion.
●Features
1) Gesture function
www.Data2Sh) eeLtE4DU.cdorimver with PWM available
3) 2 wire serial 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 VQFN032V5050
●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
SYMBOL
RATING
MIN MAX
APPLIED VOLTAGE
AVDD
DVDD
-0.3
-0.3
4.5
4.5
INPUT VOLTAGE
VAIN
VDIN
-0.3
-0.3
AVDD+0.3
DVDD+0.3
STORAGE TEMPERATURE RANGE
Tstg
-55
125
POWER DISSIPATION
Pd
304
Ambient temperature reduces a permission loss by 3.1mW per case more than 25 degrees Celsius, 1 degree Celsius.
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.
1/16
2009.04 - Rev.B
1 page  
BU21008MUV
●I/O Circuit
①CMOS INPUT
②CMOS Schmitt INPUT
Technical Note
③CMOS OUTPUT
I
CIN PAD CIN PAD
④CMOS 3stute OUTPUT with
ANALOG-SW
ASW
AIN
I
www.DataSheet4U.com
OE
PAD
⑤CMOS Schmitt INOUT
CIN
I PAD
OEN
PAD
www.rohm.com
© 2009 ROHM Co., Ltd. All rights reserved.
5/16
2009.04 - Rev.B
5 Page 
BU21008MUV
Technical Note
【E4h : Gesture Clock Setting】
Name:
GES_CLK
Address:
E4h
Description: This register allows setting of the time base for the gesture detection. It sets a divide ratio of the clock used.
The maximum judgment time and the sampling interval of the gesture can be set by changing this clock.
Gesture sampling interval =
1 / ( ( Internal oscillation frequency) / ( 2 * 16 * 16 ) * 1 [sec]
1 / ( ( Internal oscillation frequency) / ( 2 * 16 * 16 ) * 2 [sec]
1 / ( ( Internal oscillation frequency) / ( 2 * 16 * 16 ) * 4 [sec]
1 / ( ( Internal oscillation frequency) / ( 2 * 16 * 16 ) * 8 [sec]
… G_DIV = 0
… G_DIV = 1
… G_DIV = 2
… G_DIV = 3
Gesture maximum judgment time＝(Gesture sampling interval) * TO * 16 [sec]
For example with an internal clock of 1.1MHz
G_DIV
0
1
2
3
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Bit7
E4h -
R/W -
Initial val.
-
Gesture sampling interval[msec]
0.46
0.93
1.86
3.72
Bit6 Bit5 Bit4
---
---
---
Gesture maximum judgment time[sec]
1.90
3.81
7.62
15.2
Bit3 Bit2 Bit1 Bit0
- - G_DIV[1] G_DIV[0]
- - WW
- - 10
【E5h : Gesture Timeout Data Setting】
Name:
GES_TIMEOUT
Address:
E5h
Description: The maximum judgment time of the gesture is set.
A key sequence which exceeds this time is not recognized.
Gesture Maximum Judgment Time＝(Gesture sampling interval) * TO * 16 [sec]
E5h
R/W
Initial val.
Bit7
TO[7]
W
1
Bit6
TO[6]
W
1
Bit5
TO[5]
W
1
Bit4
TO[4]
W
1
Bit3
TO[3]
W
1
Bit2
TO[2]
W
1
Bit1
TO[1]
W
1
Bit0
TO[0]
W
1
【E6h : Gesture Test Setting】
Name:
GES_TIMEOUT
Address: E6h
Description: When this test bit is enabled (1) then the lower 4 bits of 0xFE(DLED) are used for the gesture recognition
instead of the sensor inputs.
Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0
E6h - - - - - - - TEST
R/W - - - - - - - W
Initial val.
-
-
-
-
-
-
-
0
【EEh : Soft Calibration】
Name:
CALIB
Address:
EEh
Description: This forces a chip re-calibration when a 1 is written and returns to 0 afterward automatically.
Please note that one should always re-calibrate after changing the gain adjustment value.
Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0
EEh - - - - - - - CALIB
R/W - - - - - - - W
Initial val.
-
-
-
-
-
-
-
0
www.rohm.com
© 2009 ROHM Co., Ltd. All rights reserved.
11/16
2009.04 - Rev.B
11 Page | ||
| Páginas | Total 17 Páginas | |
| PDF Descargar | [ Datasheet BU21008MUV.PDF ] | |
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