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BU21079F Schematic ( PDF Datasheet ) - ROHM Semiconductor

Teilenummer BU21079F
Beschreibung Capacitive Switch Controller ICs
Hersteller ROHM Semiconductor
Logo ROHM Semiconductor Logo 




Gesamt 30 Seiten
BU21079F Datasheet, Funktion
Capacitive Controller ICs
Capacitive Switch Controller ICs
BU21079F
General Description
BU21079F is a capacitive switch controller used for
operating switches.
Low power consumption is achieved using the
intermittent operation mode.
In addition to a regular simple switch, it supports matrix
switches which are arranged in the matrix sensors. If
external noise and temperature drift are detected, the
automatic self-calibration is activated.
Features
8 capacitive sensor ports
Supports matrix switches. Maximum of 16
switches.
Automatic self-calibration
Continued touch detection
Sends an interrupt when there is a detected result
of switch operation
2-wire serial bus interface
3.3V or 5.0V single power supply
Built-in Power-On-Reset and Oscillator
Applications
Electronic devices with multiple switches.
Information appliances such as printers.
AV appliances such as digital TV and HDD
recorder.
Notebook PC.
Air-conditioner. Refrigerator. Electrical rice cooker.
Typical Application Circuit
Key Specifications
Input voltage range
Operating temperature range
Operating current
Detect cycle
Packages
BU21079F :
3.0V to 5.5V
-25to 85
2.5mA (Typ)
6msec (Typ)
SOP16
10.00 ×6.20 ×1.71
Figure 1. Typical Application Circuit
Product structureSilicon monolithic integrated circuit
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© 2013 ROHM Co., Ltd. All rights reserved.
TSZ2211114001
This product has no designed protection against radioactive rays
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TSZ02201-0Y1Y0FZ00150-1-2
2013.09.25 Rev.001
http://www.Datasheet4U.com






BU21079F Datasheet, Funktion
BU21079F
Datasheet
Register Map (OSC = 50MHz, unless otherwise noted.)
No accessing to the reserved areas is allowed
Group Address
Name
0x00
SIN_DATA0
0x01
SIN_DATA1
0x02
SIN_DATA2
0x03
SIN_DATA3
Detect
value
0x04
0x05
SIN_DATA4
SIN_DATA5
0x06
SIN_DATA6
0x07
SIN_DATA7
0x08
SIN_DATA8
0x09-0F
reserved
0x10
INTERRUPT
0x11
SIN_STATE
0x12
Reserved
0x13
DETECT_SW_ON
0x14 DETECT_SLIDER_ON
0x15
DETECT_MAT_ON
0x16
DETECT_SW_OFF
Detect
result
0x17
0x18
DETECT_SLIDER_OFF
DETECT_MAT_OFF
0x19 DETECT_SW_CONT
0x1A
Reserved
0x1B DETECT_MAT_CONT
0x1C
STATE
0x1D
Reserved
0x1E
RACT
0x1F-84
Reserved
Reset
setting
0x85
0x86-89
0x8A
SOFTRESET0
Reserved
SOFTRESET1
- 0x8B-BF
Reserved
0xC0
CFG_SIN_1_0
0xC1
CFG_SIN_3_2
0xC2
CFG_SIN_5_4
0xC3
CFG_SIN_7_6
0xC4
CFG_SIN_x_8
0xC5-C7
Reserved
Sensor
setting
0xC8
0xC9
GAIN_1_0
GAIN_x_2
0xCA
ON_TH0
0xCB
ON_TH1
0xCC
ON_TH2
0xCD
OFF_TH
0xCE
OVERSAMPLES
0xCF
CONTTIMES
R/W Ini
7
6
5
4
3
2
1
0
R 0x00
SD_SIN0
R 0x00
SD_SIN1
R 0x00
SD_SIN2
R 0x00
SD_SIN3
R 0x00
SD_SIN4
R 0x00
SD_SIN5
R 0x00
SD_SIN6
R 0x00
SD_SIN7
R 0x00
SD_SIN8
R 0x00
-
R 0x00 CONTDET
OFFDET
ONDET
PERCAL
WDT
ERCAL
CAL
INI
R 0x00 SIN7_STAT SIN6_STAT SIN5_STAT SIN4_STAT SIN3_STAT SIN2_STAT SIN1_STAT SIN0_STAT
R 0x00
-
R 0x00 SW7_ON
SW6_ON
SW5_ON
SW4_ON
SW3_ON
SW2_ON
SW1_ON
SW0_ON
R 0x00 SLIDER_ON
SLIDER_CNT
R 0x00 MAT_ON
-
KEY_ON
R 0x00 SW7_OFF
SW6_OFF
SW5_OFF
SW4_OFF
SW3_OFF
SW2_OFF
SW1_OFF
SW0_OFF
R 0x00 SLIDER_OFF
-
R 0x00 MAT_OFF
-
KEY_OFF
R 0x00 SW7_CONT SW6_CONT SW5_CONT SW4_CONT SW3_CONT SW2_CONT SW1_CONT SW0_CONT
R 0x00
-
R 0x00 MAT_CONT
-
KEY_CONT
R 0x00 E_CALIB
-
-
-
-
-
INTVL
CALIB
R 0x00
-
R 0x00
RACT
R 0x00
-
R/W 0x00
SRST[7:0]
--
reserved
R/W 0x00
SRST[15:8]
--
reserved
R/W 0x00
GA_SIN1
ON_SIN1
GA_SIN0
ON_SIN0
R/W 0x00
GA_SIN3
ON_SIN3
GA_SIN2
ON_SIN2
R/W 0x00
GA_SIN5
ON_SIN5
GA_SIN4
ON_SIN4
R/W 0x00
GA_SIN7
ON_SIN7
GA_SIN6
ON_SIN6
R/W 0x00
-
-
GA_SIN8
ON_SIN8
R/W 0x00
-
R/W 0x00
GA1
GA0
R/W 0x00
-
GA2
R/W 0x00
ON0
R/W 0x00
ON1
R/W 0x00
ON2
R/W 0x00
-
OFF
R/W 0x00
OST
-
R/W 0x00 CONTSEL
-
CONT
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© 2013 ROHM Co., Ltd. All rights reserved.
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2013.09.25 Rev.001
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BU21079F pdf, datenblatt
BU21079F
Datasheet
0xCD : Value of the threshold for "On Off"
Name:
OFF
Address:
Description:
0xCD
This register is used for setting the threshold for “On Off” operation. If the 8bit ADC value of each sensor
(register SENS_DATA) is smaller than this value, then the “On Off” operation of the sensor is enabled.
The setting range 0x00 OFF ON 0xFF
0xCD
R/W
Initial val.
Bit7
-
-
-
Bit6
OFF [6]
R/W
0
Bit5
OFF [5]
R/W
0
Bit4
OFF [4]
R/W
0
Bit3
OFF [3]
R/W
0
Bit2
OFF [2]
R/W
0
Bit1
OFF [1]
R/W
0
Bit0
OFF [0]
R/W
0
0xCE :Chattering cancel
Name:
OVERSAMPLES
Address: 0xCE
Description: OST[3:0]This register has the number of times of over sampling for canceling chattering in the “ON” or
“OFF” operation.
The continuous button level of over sampling frequency + three times or less is disregarded.
If the register value is 0, then the number of times of over sampling is 1.
Sampling rateAbout 6msec.
Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0
0xCE
OST[3]
OST[2]
OST[1]
OST[0]
-
-
-
-
R/W R/W R/W R/W R/W
-
-
-
-
Initial val.
0
0
0
0
-
-
-
-
0xCF :Long press
Name:
CONTTIMES
Address: 0xCF
Description: CONTSELThe output pattern of an interrupt generated after recognizing long press is set up.
1 : Every continuous touch period.
0 : First detect only.
CONT[5:0]Continuous touch period is about 0.036 [sec] x CONT.
If the setting value is 0x0, continuous touch function is invalid.
(0.036sec Continuous touch period 2.3sec)
0xCF
R/W
Initial val.
Bit7
CONTSEL
R/W
0
Bit6
-
-
-
Bit5
CONT[5]
R/W
0
Bit4
CONT[4]
R/W
0
Bit3
CONT[3]
R/W
0
Bit2
CONT[2]
R/W
0
Bit1
CONT[1]
R/W
0
Bit0
CONT[0]
R/W
0
0xD0, 0xD2, 0xD3 : Mask switch operation
Name:
MSK_SW_KEY
Address: 0xD0, 0xD2, 0xD3
Description: This register is used for masking the operation of each matrix switches and each simple switches. The
masked switches are excluded from the interrupt factor. It is prohibited to assign one sensor to both matrix
switch and a simple switch. Unused switches must be masked.
1 : Masked. 0 : Unmasked.
0xD0
0xD2
0xD3
R/W
Initial val.
Bit7
MSK_SW7
MSK_KEYH
MSK_KEYP
R/W
0
Bit6
MSK_SW6
MSK_KEYG
MSK_KEYO
R/W
0
Bit5
MSK_SW5
MSK_KEYF
MSK_KEYN
R/W
0
Bit4
MSK_SW4
MSK_KEYE
MSK_KEYM
R/W
0
Bit3
MSK_SW3
MSK_KEYD
MSK_KEYL
R/W
0
Bit2
MSK_SW2
MSK_KEYC
MSK_KEYK
R/W
0
Bit1
MSK_SW1
MSK_KEYB
MSK_KEYJ
R/W
0
Bit0
MSK_SW0
MSK_KEYA
MSK_KEYI
R/W
0
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© 2013 ROHM Co., Ltd. All rights reserved.
TSZ2211115001
12/34
TSZ02201-0Y1Y0FZ00150-1-2
2013.09.25 Rev.001
http://www.Datasheet4U.com

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