Cypress Semiconductor CY3280-MBR3 データシート

Document Number: 001-85330 Rev. *G 

Page 8 of 37

3. The center pad on the QFN package should be connected to ground (VSS) for best mechanical, thermal, and electrical performance. If it is not connected to ground, 

it should be left floating without being connected to any other signal.

1

CS0/PS0

–

CapSense button / proximity 

sensor, controls GPO0

Ground/Ground

CS0

2

CS1/PS1

–

CapSense button / proximity 

sensor, controls GPO1

Ground/Ground

CS1

3

CMOD

–

External modulator capacitor. 

Connect 2.2 nF/5 V/X7R or 

NPO capacitor

NA

CMOD

4

VCC

Power

Internal regulator output. 

Connect a 0.1-µF decoupling 

capacitor if VDD > 1.8 V. If VDD 

is 1.71 V to 1.89 V, short this pin 

to VDD

NA

VCC

5

VDDIO

Power

Power for I2C and HI lines

Connect to VDD

VDDIO

6

VDD

Power

Power

NA

VDD

7

VSS

Power

Ground

NA

VSS

8

CS4/GPO0

I/DO

CapSense button / GPO

Ground/Leave open

GPO0

9

CS5/GPO1

–

CapSense button / GPO

Ground/Leave open

GPO1

10

CS6/GPO2

I/DO

CapSense button / GPO

Ground/Leave open

GPO2

11

CS7/GPO3/

SH

I/DO

CapSense button / GPO/ shield 

electrode.

(SPO1 in the 

)

Ground/Leave open

GPO3

12

CS2/GUARD

–

CapSense button, controls 

GPO2 / guard sensor

Leave open/Leave open

CS2

13

CS3

–

CapSense button, controls 

GPO3

Ground

CS3

14

I2C SDA

DIO

I2C data

Leave open

I2C SDA

15

I2C SCL

DIO

I2C clock

Leave open

I2C SCL

16

HI/BUZ

DO

Host interrupt / buzzer output

Supply voltage for buzzer and 

pull-up resistor on HI should be 

equal to VDDIO

(SPO0 in the 

).

Leave open/leave open

HI

17

Center Pad

E-pad

Connect to VSS for best 

mechanical, thermal and 

electrical performance

Floating, not connected to 

any other signal

E-pad

Legend: I = Analog Input, O = Analog Output, DIO = Digital Input/Output, CS = CapSense Button, PS = Proximity Sensor

SH = Shield Electrode, BUZ = Buzzer Output, GPO = General Purpose Output, GUARD = Guard Sensor, SPO = Special Purpose Output.

CS0/PS0

CMOD

VCC

VD

DI

O

I2

C

 SCL

I2

C

 SDA

CS3

CS2/GUARD

VD

D

CS4

/GP

O0

CS5/GPO1

CS1/PS1

CS6/GPO2

CS7/GPO3/SH

HI/BU

Z

VS

S

1
2

3
4

12
11

10

9

16

15

14

13

5

6

7

8