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PDF BU21170MUV Data sheet ( Hoja de datos )
| Número de pieza | BU21170MUV | |
| Descripción | Capacitive Switch Controller IC | |
| Fabricantes | ROHM Semiconductor | |
| Logotipo |  |
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Datasheet
Capacitive Controller ICs
Capacitive Switch Controller IC
BU21170MUV
General Description
BU21170MUV is a capacitive sensor controller for switch
operation.
BU21170MUV has five sensors and provides the simple
switch function by each sensor.
If external noise and temperature drift are detected, the
automatic self-calibration is operated.
Include LED controller with PWM function.
Features
5 capacitive sensor ports.
Automatic self-calibration.
Continued touch detection.
LED controller with PWM function.
Inform the detected result of switch operation by
interrupt.
2-wire serial bus interface.
Single power supply.
Built-in Power-On-Reset and Oscillator.
Key Specifications
Power Supply Voltage Range:
3.0V to 5.5V
Operating Temperature Range:
-25°C to +85°C
Operating Current:
3.5mA(Typ without load)
Scan Rate:
14.8msec(Typ)
Package
VQFN020V4040
W(Typ) x D(Typ) x H(Max)
4.00mm x 4.00mm x 1.00mm
Applications
Information appliance as printer.
AV appliance as digital TV and HDD recorder.
Notebook PC.
VQFN020V4040
Typical Application Circuit
VDD
VDD
VDD
VDD
VDD
15
16
LED4
N.C.
SIN4
SIN3
SIN2
20
1
BU21170MUV
TOP VIEW
11
10
INT
SDA
SCL
TEST
VSS
6
5
VDD
HOST
Recommended DT number : DTC043ZEB
VDD
Figure 1. Typical Application Circuit
○Product structure：Silicon monolithic integrated circuit
.www.rohm.com
© 2013 ROHM Co., Ltd. All rights reserved.
TSZ22111・14・001
○This product has no designed protection against radioactive rays
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TSZ02201-0L5L0F300830-1-2
14.Jul.2016 Rev.002
1 page  
BU21170MUV
Register Map
(OSC = 50MHz , unless otherwise noted)
No accessing to the reserved areas is allowed.
www.rohm.com
© 2013 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
5/29
TSZ02201-0L5L0F300830-1-2
14.Jul.2016 Rev.002
5 Page 
BU21170MUV
【0xD0 : Configuration continuous touch】
Name:
CONTTIMES
Address:
0xD0
Description: CONTSEL：This register is to select the interrupt frequency by detection continuous touch.
1 : Every continuous touch period.
0 : First detect only.
CONT[5:0]：Continuous touch period is about 0.1[sec] x CONT.
If the setting value is 0x0, continuous touch function is disable.
(0.1sec ≤ Continuous touch period ≤ 6.3sec)
Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0
0xD0
CONTSEL
-
CONT[5:0]
R/W R/W - R/W R/W R/W R/W R/W R/W
Initial val.
0
0
0
0 0000
【0xD1 : Configuration oversampling】
Name:
OSTIMES
Address:
0xD1
Description: OST[3:0]：This register is the number of times of oversampling for canceling chattering to the ‘ON’ or ‘OFF’
operation. If the continuance of the ‘ON’ or ‘OFF’ operations is lower than this register, the
operations are ignored. If this register value is ‘0’, the number of times of oversampling is ‘1’.
Sampling rate：About 14.8msec.
0xD1
R/W
Initial val.
Bit7
R/W
0
Bit6 Bit5
OST[3:0]
R/W R/W
00
Bit4 Bit3 Bit2 Bit1 Bit0
----
R/W - - - -
0 0000
【0xDF : Mask interrupt】
Name:
MASK_INTERRUPT
Address:
0xDF
Description: This register is for mask to the interrupt factor. The masked interrupt factor is not shown on the register
‘Interrupt factor (address 0x10)’, so it does not affect to output port INT.
1 : Masked 0 : Unmasked (default)
MSK_CAL : Mask for Software-calibration finish :
This bit does mask to the interrupt of Software-calibration finish (the bit CAL in the register ‘Interrupt factor’
(address 0x10)).
MSK_ERCAL : Mask for Self-calibration finish :
This bit does mask to the interrupt of Self-calibration finish (the bit ERCAL in the register ‘Interrupt factor’
(address 0x10)).
MSK_PERCAL : Mask for Periodic calibration finish :
This bit does mask to the interrupt of Periodic calibration finish (the bit PERCAL in the register ‘Interrupt
factor’ (address 0x10)).
Bit7 Bit6 Bit5
Bit4 Bit3 Bit2
Bit1 Bit0
0xDF
-
-
-
MSK_PERCAL
-
MSK_ERCAL MSK_CAL
-
R/W - - -
R/W - R/W R/W -
Initial val.
0
0
0
000
00
www.rohm.com
© 2013 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
11/29
TSZ02201-0L5L0F300830-1-2
14.Jul.2016 Rev.002
11 Page | ||
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