CY8CMBR3002 Datasheet, PDF (17/42 Pages) Cypress Semiconductor – CapSense® Express™ Controllers with SmartSense™ Auto-tuning 16 Buttons, 2 Sliders, Proximity Sensors

CY8CMBR3002, CY8CMBR3102
CY8CMBR3106S, CY8CMBR3108
CY8CMBR3110, CY8CMBR3116 Datasheet
Noise Immunity
■ The CY8CMBR3xxx family features the robust CSD PLUS
capacitive sensing algorithm.
■ Uses pseudo-random sequence (PRS) clock source to
minimize electromagnetic interference.
■ Provides advanced noise immunity algorithm, that is, electro-
magnetic compatibility (EMC), for superior noise immunity
against external radiated and conducted noise
❐ EMC algorithm has higher average power consumption. For
low-power applications, where noise conditions are not ex-
treme, this feature can be disabled using the EZ-Click tool.
■ Provides median and IIR filters for button and slider sensors.
■ Provides an Advanced-Low-Pass (ALP) filter for proximity
sensors.
Flanking Sensor Suppression
■ Distinguishes between signals from closely spaced buttons,
eliminating false touches.
■ Can be enabled or disabled individually on each CapSense
button.
■ On touch detection by two or more sensors on which FSS is
enabled, only the first touched sensor reports active status.
■ Allows only one button at a time to be in the Touch state.
■ Supported only on CapSense buttons.
Figure 4. Reported Sensor Status with FSS Enabled
CS0
CS1
CS2
CS3
No sensor touched
CS0
CS1
CS2
CS3
CS1 is touched, CS1 reported ON
CS0
CS1
CS2
CS3
CS2 also touched along with CS1,
CS1 is reported ON
CS0
CS1
CS2
CS3
Only CS2 is touched; reported ON
General-Purpose Outputs
■ Supports up to eight GPOs, multiplexed with sensor inputs or
other functionality, depending on the part number.
■
Provides GPO status control.
controlled by the sensor input
GPOs
or the
can be configured to
host through the I²C
be
interface.
■ Allows for configurable Active LOW or Active HIGH logic output.
The Active LOW logic output can be configured to directly drive
LEDs in the current sink mode. The Active HIGH logic output
can be configured to interface the GPOs with the host and other
circuits.
■ The GPOx status will not be retained in the Deep Sleep mode.
The GPOx output state will be reset to default during deep sleep
and upon wake-up from deep sleep.
Figure 5. CSx Controls GPOx (Active HIGH Logic)
Sensor
Sensor
Activated ^Deactivated
CSx
GPOx
■ Supports two drive modes:
❐ Open-drain drive mode (HIGH-Z and GND) for analog volt-
age outputs and LED direct drive
❐
Strong drive mode
and other circuits
(V_DD
and
GND)
to
interface
with
the
host
■ Supports PWM on GPOs for LED brightness control. Two
different duty cycles can be configured for Sensor Touch and
No Touch states (Active and Inactive state duty cycles). When
the GPO is host-controlled, and if the PWM control is enabled
for the GPO, the same Touch and No Touch duty cycles will be
used for the On and Off states of the host-controlled GPO.
■ When the proximity sensor is enabled, the proximity event
controls the respective GPOs. A touch event on a proximity
sensor is indicated only through the I²C register map.
■ Sensor fault conditions are indicated with the pulse signal on
the respective GPOs at power-up by system diagnostics.
Document Number: 001-85330 Rev. *M
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