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BU21078MUV 데이터시트 PDF




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부품번호 BU21078MUV 기능
기능 Capacitive Switch Controller ICs
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BU21078MUV 데이터시트, 핀배열, 회로
Capacitive Controller ICs
Capacitive Switch Controller ICs
BU21072MUV / BU21078MUV / BU21078FV
General Description
BU21072MUV/BU21078MUV/BU21078FV
is a capacitive sensor controller for switch operation.
In addition to a regular simple switch, support matrix
switches which are arranged in the matrix sensors. If
external noise and temperature drift are detected, the
automatic self-calibration is operated.
Include LED controller with PWM function.
Features
10 capacitive sensor ports.
(BU21072MUV)
12 capacitive sensor ports.
(BU21078MUV / BU21078FV)
Supported Matrix switches.
Maximum 16 switches.
(BU21072MUV)
Maximum 36 switches.
(BU21078MUV / BU21078FV)
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.
Applications
Appliance that require multiple switches.
Information appliance as printer.
AV appliance as digital TV and HDD recorder.
Notebook PC.
Typical Application Circuit
VDD
VDD
VDD
VDD
Key Specifications
Input voltage range
Operating temperature range
Operating current
3.0 to 5.5V
-20 to 85°C
3.5mA (Typ.)
Scan rate
Packages
BU21072MUV :
VQFN024V4040
BU21078MUV :
VQFN028V5050
BU21078FV :
SSOP-B28
16msec (Typ.)
4.00 ×4.00 ×1.00
5.00 ×5.00 ×1.00
10.00 ×7.60 ×1.35
VQFN024V4040
VQFN028V5050
SSOP-B28
21
22
SIN7 (*2)
SIN6
SIN13
SIN5
SIN14
SIN4
SIN3
28
1
BU21078
TOP VIEW
15
14
LED0
INT
SDA
SCL
TEST
VSS
DVDD 1.0uF
8
7 VDD
VDD
HOST
(*1) Unused LED pin are OPEN.
(*2) Unused SIN pin are OPEN.
Recommended DT number : DTC143ZE
Figure 1. Typical Application Circuit
○Product structureSilicon monolithic integrated circuit
www.rohm.com
© 2012 ROHM Co., Ltd. All rights reserved.
TSZ2211114001
○This product is not designed protection against radioactive rays
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BU21078MUV pdf, 반도체, 판매, 대치품
BU21072MUV / BU21078MUV / BU21078FV
Block Diagram
VDD
SDA
SCL
TEST
VREF
LDO15
OSC
LOGIC
MPU
AFE_CNT
LDO28
POR
A/D
C/V
Converter
PROM
WRAM
HOST
I/F
WDTR
PWM_CNT
LEDDRV
AFE
AVDD
DVDD
Sensor
AFE
SIN*
LED*
INT
VSS
Figure 8. Block Diagram
Description of Blocks
Sensor AFE, C/V Converter
Convert from capacitance to voltage following the order of sensors.
A/D
Convert from voltage to the detected result the digital value.
LDO28
2.73V output LDO for Sensor AFE, C/V Converter and A/D.
LDO15
1.5V output LDO for OSC and digital blocks.
OSC
Ring oscillator as the system clock.
POR
Power-On-Reset monitoring VDD as the system reset.
MPU
Based on the detection result, detect switch operations (Touch/Release/Hold) and run Auto-calibration.
Inform by the INT port to the host about that the switch operations are detected.
LED ports are controlled by the commands from the host.
PROM
Program ROM for the included MPU.
WRAM
Work RAM for the included MPU.
HOST I/F
2-wire serial bus interface compatible with I2C protocol.
AFE_CNT
Sequencer of Sensor AFE, C/V converter and A/D.
PWM_CNT
PWM timers for the LED ports.
LEDDRV
LED port drivers.
WDTR
Watchdog Timer Reset. It releases the system reset after 1 sec from that MPU cannot clear WDTR.
(If MPU cannot clear WDTR, MPU is hang-up.)
www.rohm.com
© 2012 ROHM Co., Ltd. All rights reserved.
TSZ2211115001
4/36
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14.Jul.2016 Rev.004

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BU21078MUV 전자부품, 판매, 대치품
BU21072MUV / BU21078MUV / BU21078FV
0x00-0x0F : Sensor Data
Name:
SIN_DATA
Address:
0x00-0x0F
Description:
This register shows 8bit ADC value of each sensor.
0x00
0x01
0x02
0x03
0x04
0x05
0x06
0x07
0x08
0x09
0x0A
0x0B
0x0C
0x0D
0x0E
0x0F
R/W
Initial val.
Bit7
SD_SIN0[7]
SD_SIN1[7]
SD_SIN2[7]
SD_SIN3[7]
SD_SIN4[7]
SD_SIN5[7]
SD_SIN6[7]
SD_SIN7[7]
SD_SIN8[7]
SD_SIN9[7]
SD_SIN10[7]
SD_SIN11[7]
SD_SIN12[7]
SD_SIN13[7]
SD_SIN14[7]
SD_SIN15[7]
R
0
Bit6
SD_SIN0[6]
SD_SIN1[6]
SD_SIN2[6]
SD_SIN3[6]
SD_SIN4[6]
SD_SIN5[6]
SD_SIN6[6]
SD_SIN7[6]
SD_SIN8[6]
SD_SIN9[6]
SD_SIN10[6]
SD_SIN11[6]
SD_SIN12[6]
SD_SIN13[6]
SD_SIN14[6]
SD_SIN15[6]
R
0
Bit5
SD_SIN0[5]
SD_SIN1[5]
SD_SIN2[5]
SD_SIN3[5]
SD_SIN4[5]
SD_SIN5[5]
SD_SIN6[5]
SD_SIN7[5]
SD_SIN8[5]
SD_SIN9[5]
SD_SIN10[5]
SD_SIN11[5]
SD_SIN12[5]
SD_SIN13[5]
SD_SIN14[5]
SD_SIN15[5]
R
0
Bit4
SD_SIN0[4]
SD_SIN1[4]
SD_SIN2[4]
SD_SIN3[4]
SD_SIN4[4]
SD_SIN5[4]
SD_SIN6[4]
SD_SIN7[4]
SD_SIN8[4]
SD_SIN9[4]
SD_SIN10[4]
SD_SIN11[4]
SD_SIN12[4]
SD_SIN13[4]
SD_SIN14[4]
SD_SIN15[4]
R
0
Bit3
SD_SIN0[3]
SD_SIN1[3]
SD_SIN2[3]
SD_SIN3[3]
SD_SIN4[3]
SD_SIN5[3]
SD_SIN6[3]
SD_SIN7[3]
SD_SIN8[3]
SD_SIN9[3]
SD_SIN10[3]
SD_SIN11[3]
SD_SIN12[3]
SD_SIN13[3]
SD_SIN14[3]
SD_SIN15[3]
R
0
Bit2
SD_SIN0[2]
SD_SIN1[2]
SD_SIN2[2]
SD_SIN3[2]
SD_SIN4[2]
SD_SIN5[2]
SD_SIN6[2]
SD_SIN7[2]
SD_SIN8[2]
SD_SIN9[2]
SD_SIN10[2]
SD_SIN11[2]
SD_SIN12[2]
SD_SIN13[2]
SD_SIN14[2]
SD_SIN15[2]
R
0
Bit1
SD_SIN0[1]
SD_SIN1[1]
SD_SIN2[1]
SD_SIN3[1]
SD_SIN4[1]
SD_SIN5[1]
SD_SIN6[1]
SD_SIN7[1]
SD_SIN8[1]
SD_SIN9[1]
SD_SIN10[1]
SD_SIN11[1]
SD_SIN12[1]
SD_SIN13[1]
SD_SIN14[1]
SD_SIN15[1]
R
0
Bit0
SD_SIN0[0]
SD_SIN1[0]
SD_SIN2[0]
SD_SIN3[0]
SD_SIN4[0]
SD_SIN5[0]
SD_SIN6[0]
SD_SIN7[0]
SD_SIN8[0]
SD_SIN9[0]
SD_SIN10[0]
SD_SIN11[0]
SD_SIN12[0]
SD_SIN13[0]
SD_SIN14[0]
SD_SIN15[0]
R
0
0x10 : Interrupt factor
Name:
INTERRUPT
Address:
0x10
Description:
This register shows the interrupt factors. Port INT outputs this register‟s OR operation.
INI : Initialization finish.
This register is set to '1 ' when initialization is complete after power-on-sequence or watch dog
timer reset. This register is cleared by setting '0 ' to the bit INI that is included the “Interrupt Source”
registers (Address 0xF0).
CAL : Software-calibration finish.
This register is set to '1 'when software calibration is complete. This register is cleared by setting
'0 ' to the bit CAL that is included the “Clear interrupt” registers (Address 0xF0).
ERCAL :Error.
This register is set to '1 'when IC should be executing the re-calibration. This register is cleared
by setting '0 ' to the bit ERCAL that is included the “Clear interrupt” registers (Address 0xF0). IC
executes self calibration after this interrupt.
PWM : PWM continuous flashing of LED finish.
This register is set to '1 'when LED PWM drive has finished. This register is cleared by clearing
every bit of the “Interrupt of PWM continuous flashing” register.
PERCAL : Periodic calibration finish.
This register is set to '1 'when periodic calibration is complete. This register is cleared by setting
'0 ' to the bit PERCAL that is included the “Clear interrupt” registers (Address 0xF0).
ONDET : Detection of switch-on.
This register is set to '1 'when it detects a switch operation is considered to be Off. This register is
cleared by clearing every bit of the “Detection Switch-On” register.
OFFDET : Detection of switch-off.
This register is set to '1 'when it detects a switch operation is considered to be Off. This register is
cleared by clearing every bit of the “Detection Switch-Off” register.
CONTDET : Detection of continued touch.
This register is set to '1 'when it detects a continued touch switch operation. This register is
cleared by clearing every bit of the “Detection continued touch” register.
0x10
R/W
Initial val.
Bit7
CONTDET
R
0
Bit6
OFFDET
R
0
Bit5
ONDET
R
0
Bit4
PERCAL
R
0
Bit3
PWM
R
0
Bit2
ERCAL
R
0
Bit1
CAL
R
0
Bit0
INI
R
0
www.rohm.com
© 2012 ROHM Co., Ltd. All rights reserved.
TSZ2211115001
7/36
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14.Jul.2016 Rev.004

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BU21078MUV

Capacitive Switch Controller ICs

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