Cypress Semiconductor CY3280-MBR3 データシート

Document Number: 001-85330 Rev. *G 

Page 13 of 37

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The CY8CMBR3xxx family features the robust CSD PLUS 

capacitive sensing algorithm.

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Uses pseudo-random sequence (PRS) clock source to 

minimize electromagnetic interference.

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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 

 tool.

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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.

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Allows only one button at a time to be in the Touch state. 

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Supported only on CapSense buttons.

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Supports up to eight GPOs, multiplexed with sensor inputs or 

other functionality, depending on the part number.

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Provides GPO status control. GPOs can be configured to be 

controlled by the sensor input or the host through the I

2

C 

interface.

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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.

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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.

■

Supports two drive modes:

❐

Open-drain drive mode (HIGH-Z and GND) for analog volt-

age outputs and LED direct drive

❐

Strong drive mode (V

DD

 and GND) to interface with the host 

and other circuits

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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.

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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 I

2

C register map.

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Sensor fault conditions are indicated with the pulse signal on 

the respective GPOs at power-up by system diagnostics.

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Keeps the GPO status ON for a particular period of time after 

the falling edge of a sensor, for better visual indication through 

LEDs

CS0

CS1

CS2

CS3

CS0

CS1

CS2

CS3

CS2 also touched along with CS1,

CS1 is reported ON

No sensor touched

CS0

CS2

CS3

CS0

CS2

CS1

CS3

CS1

CS1 is touched, CS1 reported ON

Only CS2 is touched; reported ON

CS2

CS1

C

C

C

C

S2

CSx

GPOx

Sensor 

Activated

Sensor 

Deactivated