Datasheet

CY8CMBR3002, CY8CMBR3102
CY8CMBR3106S, CY8CMBR3108
CY8CMBR3110, CY8CMBR3116 Datasheet
Document Number: 001-85330 Rev. *G Page 14 of 37
Figure 5. CSx Controls GPOx with LED ON Time Enabled
■ 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
■ Can be enabled in all configurations of GPOs except the Toggle
mode
■ Not applicable when the sensor status is turned off by Sensor
Auto Reset
Toggle
■ 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).
Figure 6. CSx Controls GPOx with the Toggle Enabled
■ Can be enabled only when the GPO is directly controlled by a
capacitive sensor.
■ Can be enabled or disabled individually on each capacitive
sensor.
■ 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.
Buzzer Signal Output
■ 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.
■ Supports buzzer connection, as shown in the following figure.
Figure 7. Buzzer Connection
[4]
■ 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 EZ-Click tool or by writing to the
corresponding control register. Refer to System Specifications
on page 23 for the supported buzzer frequencies.
■ Generates PWM output for a fixed duration (ON time) when a
touch is detected. The ON time is configurable through
EZ-Click, from 100 ms to 12.7 s, in steps of 100 ms,
■ Buzzer signal output and EMC (refer to the CY8CMBR3xxx
Registers TRM) are mutually exclusive features. These must
not be enabled simultaneously.
Figure 8. Buzzer Activation on a Touch Event
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
CY8CMBR 3xxx
BUZ
Buzzer
V
DDIO
Note
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
Activ ate d