BU21010MUV-E2 Rohm Semiconductor, BU21010MUV-E2 Datasheet - Page 13

• Manufacturer Part Number: BU21010MUV-E2
• Description: IC CTLR CAP SENSOR 8CH 16VQFN
• Manufacturer: Rohm Semiconductor
• Type: Capacitive Sensor Controllerr

Specifications of BU21010MUV-E2

• Input Type: Logic
• Output Type: Logic
• Interface: 2-Wire Serial
• Current - Supply: 300µA
• Mounting Type: Surface Mount
• Package / Case: 16-VQFN
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

●Operation mode
●Initialization procedure
●Power supply turning on procedure
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BU21010MUV
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This IC has a normal mode, idle mode and a shutdown mode as states of operation.
【Normal mode】
【Idle mode】
【Shutdown mode】
A normal power on sequence is:
You should always power on DVDD at the same time as AVDD or before AVDD.
This is the normal operation of the device. Output pin INT="L".
This is the mode when the normal mode times out due to inactivity on the keys. In this mode the control interface is still
alive.
In this mode the device is completely stopped – and reset. This is achieved by making the terminal SDN L. All analog
circuits and the logic circuits are stopped. The return from the shutdown mode returns by making the terminal SDN H.
(1) Power on
(2) Setup the registers
(3) Write ‘1’ to 0xEF (done register)
*Usually time-out is aimed at about 200msec or less.
*Transition between normal and idle modes is automatic and without software control.
*After shut-down all registers have their default values.
<sensing operation begins after auto-calibration occurs>
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2009.04 - Rev.B
Technical Note