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BU21072MUV-E2 датащи(PDF) 4 Page - Rohm

номер детали BU21072MUV-E2
подробное описание детали  Capacitive Switch Controller ICs
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производитель  ROHM [Rohm]
домашняя страница  http://www.rohm.com
Logo ROHM - Rohm

BU21072MUV-E2 датащи(HTML) 4 Page - Rohm

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BU21072MUV / BU21078MUV / BU21078FV
TSZ02201-0L5L0F300640-1-2
© 2012 ROHM Co., Ltd. All rights reserved.
www.rohm.com
TSZ22111・15・001
14.Jul.2016 Rev.004
Block Diagram
LDO15
LDO28
VREF
OSC
Sensor
AFE
C/V
Converter
A/D
AVDD
DVDD
SIN*
LED*
LOGIC
AFE
MPU
WRAM
PROM
LEDDRV
VDD
VSS
AFE_CNT
PWM_CNT
INT
WDTR
POR
HOST
I/F
TEST
SCL
SDA
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.)
Figure 8. Block Diagram


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