Cypress Semiconductor CY3280-MBR3 Scheda Tecnica

Document Number: 001-85330 Rev. *G 

Page 14 of 37

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Can be enabled only when the GPO is directly controlled by a 

CapSense sensor

■

Can be enabled or disabled on each sensor and the ON Time 

duration can be configured from 0 to 2 seconds in 20-ms incre-

ments

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Can be enabled in all configurations of GPOs except the Toggle 

mode

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Not applicable when the sensor status is turned off by Sensor 

Auto Reset

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The controller can toggle the GPO state at every rising edge 

of a sensor activation event to mimic the functionality of a 

mechanical toggle switch (a touch event for a button sensor 

and a proximity event for proximity sensors activates a sensor).

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Can be enabled only when the GPO is directly controlled by a 

capacitive sensor.

■

Can be enabled or disabled individually on each capacitive 

sensor.

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Can be enabled in all configurations of GPOs—that is, Active 

LOW and Active HIGH DC output, PWM output, open-drain, 

and strong drive modes. 

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Produces a PWM signal to drive a Piezo-Buzzer that generates 

audio feedback when a touch is detected on a CapSense button 

or a guard sensor.

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Supports buzzer connection, as shown in the following figure.

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PWM frequency is configurable: The buzzer frequency is 

configurable to meet different Piezo-Buzzer drive requirements 

and to provide different tones. The buzzer frequency may be 

configured either by using the 

 tool or by writing to the 

corresponding control register. Refer to 

 for the supported buzzer frequencies.

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Generates PWM output for a fixed duration (ON time) when a 

touch is detected. The ON time is configurable through 

, from 100 ms to 12.7 s, in steps of 100 ms,

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Buzzer signal output and EMC (refer to the 

) are mutually exclusive features. These must 

not be enabled simultaneously.

The buzzer output does not restart if multiple trigger events occur 

before the Buzzer ON Time elapses.

CSx bit in 

BUTTON_STAT

GPOx

LED ON Time

BUTTON_STAT 
register shows 

sensor inactivation

CSx physical 

status

Sensor 

Deactivated

Button response time

Sensor 

Activated

CSx

GPOx

Sensor 

Activated

Sensor 

Deactivated

Sensor 

Activated

CY8CMBR3xxx

BUZ

Buzzer

V

DDIO

4. Buzzer must be connected between V

DDIO

 and the BUZ pin. If V

DDIO

 is not available on the device, connect the buzzer to V

DD

 instead of V

DDIO

.

CSx

BUZ

Buzzer ON Time

CSx Active

Sensor 

Activated