Cypress Semiconductor CY3280-MBR3 データシート

CapSense

® 

Express™ Controllers

With SmartSense™ Auto-tuning

16 Buttons, 2 Sliders, Proximity Sensors

•

198 Champion Court

•

San Jose

,

CA 95134-1709

• 408-943-2600

Document Number: 001-85330 Rev. *G 

 Revised May 6, 2014 

The CY8CMBR3xxx CapSense

®

 Express™ controllers enable advanced, yet easy-to-implement, capacitive touch sensing user 

interface solutions. This register-configurable family, which supports up to 16 capacitive sensing inputs, eliminates time-consuming 
firmware development. These controllers are ideal for implementing capacitive buttons, sliders, and proximity sensing solutions with 
minimal development-cycle times. 
The CY8CMBR3xxx family features an advanced analog sensing channel and the Capacitive Sigma Delta PLUS (CSD PLUS) sensing 
algorithm, which delivers a signal-to-noise ratio (SNR) of greater than 100:1 to ensure touch accuracy even in extremely noisy 
environments. These controllers are enabled with Cypress's SmartSense™ Auto-tuning algorithm, which compensates for manufac-
turing variations and dynamically monitors and maintains optimal sensor performance in all environmental conditions. In addition, 
SmartSense Auto-tuning enables a faster time-to-market by eliminating the time-consuming manual tuning efforts during development 
and production ramp-up. 
Advanced features, such as LED brightness control, proximity sensing, and system diagnostics, save development time. These 
controllers enable robust water-tolerant designs by eliminating false touches due to mist, water droplets, or streaming water. The 
CY8CMBR3xxx controllers are offered in a variety of small form factor industry-standard packages. 
The ecosystem for the CY8CMBR3xxx family includes development tools—software and hardware—to enable rapid user interface 
designs. For example, the EZ-Click Customizer tool is a simple graphical user interface software for configuring the device features 
through the I

2

C interface. This tool also supports CapSense data viewing to monitor system performance and support validation and 

debugging. Another tool, the Design Toolbox, simplifies circuit board layout by providing design guidelines and layout recommenda-
tions to optimize sensor size, trace lengths, and parasitic capacitance. To quickly evaluate the CY8CMBR3xxx family features, use 
the 

.

■

Register-configurable CapSense Express controller

❐

No firmware development required

❐

Patented CSD sensing algorithm

❐

High sensitivity (0.1 pF)
• Overlay thickness of up to 15 mm for glass and 5 mm for 

plastic 

• Proximity solutions
• Sensitivity up to 2 fF per count

❐

Best-in-class >100:1 SNR performance 
• Superior noise-immunity performance against conducted 

and radiated noise

• Ultra-low radiated emissions

❐

SmartSense Auto-tuning
• Sets and maintains optimal sensor performance during 

run time

• Eliminates manual tuning during development and produc-

tion

■

Low-power CapSense

❐

Average current consumption of 22 µA per sensor at 120-ms 

refresh interval

❐

Wide parasitic capacitance (C

P

) range: 5–45 pF

■

Advanced user interface features

❐

Water tolerance

❐

User-configurable LED brightness for visual touch feedback
• Up to eight high-sink current GPOs to drive LEDs

❐

Buzzer signal output for audible touch feedback

❐

Flanking Sensor Suppression (FSS) to eliminate false touch-

es in closely spaced buttons

❐

Analog voltage output

❐

Attention line interrupt to the host to indicate any change in 

sensor status

■

System diagnostics to detect

❐

Improper value of the modulating capacitor (CMOD)

❐

Out of range sensor parasitic capacitance (C

P

)

❐

Sensor shorts

■

EZ-Click™ Customizer tool

❐

Simple GUI for device configuration

❐

Data viewing and monitoring for CapSense buttons, sliders, 

and proximity sensors

❐

System diagnostics for rapid debug

■

I

2

C slave

❐

Supports up to 400 kHz

❐

Wake-on-hardware address match

❐

No bus-stalling or clock-stretching during transactions 

■

Low-power 1.71-V to 5.5-V operation

❐

Deep Sleep mode with wake-up on interrupt and I

2

C address 

detect

■

Industrial temperature range: –40 °C to +85 °C

■

Package options

❐

8-pin SOIC (150 mil)

❐

16-pin SOIC (150 mil) 

❐

16-pin QFN (3 × 3 × 0.6 mm)

❐

24-pin QFN (4 × 4 × 0.6 mm)