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CY8CMBR3002 Schematic ( PDF Datasheet ) - Cypress Semiconductor

Teilenummer CY8CMBR3002
Beschreibung Controllers
Hersteller Cypress Semiconductor
Logo Cypress Semiconductor Logo 




Gesamt 30 Seiten
CY8CMBR3002 Datasheet, Funktion
CY8CMBR3002, CY8CMBR3102
CY8CMBR3106S, CY8CMBR3108
CY8CMBR3110, CY8CMBR3116 Datasheet
CapSense® Express™ Controllers
with SmartSense™ Auto-tuning
16 Buttons, 2 Sliders, Proximity Sensors
CapSense® Express™ Controllers with SmartSense™ Auto-tuning 16 Buttons, 2 Sliders, Proximity Sensors
General Description
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
manufacturing 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 liquid-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 I2C 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
recommendations to optimize sensor size, trace lengths, and parasitic capacitance. To quickly evaluate the CY8CMBR3xxx family
features, use the CY3280-MBR3 Evaluation Kit.
Features
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 (CP) range: 5–45 pF
Advanced user interface features
Liquid 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 (CP)
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
I2C 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 I2C 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)
Cypress Semiconductor Corporation • 198 Champion Court
Document Number: 001-85330 Rev. *M
• San Jose, CA 95134-1709 • 408-943-2600
Revised January 13, 2016






CY8CMBR3002 Datasheet, Funktion
CY8CMBR3002, CY8CMBR3102
CY8CMBR3106S, CY8CMBR3108
CY8CMBR3110, CY8CMBR3116 Datasheet
Features Overview
CapSense Sensors
The CY8CMBR3xxx family of controllers supports up to 16
capacitive sensors. These can be configured as follows:
Up to 16 CapSense buttons
Up to two sliders: Configurable as linear or radial sliders
Up to two proximity sensors that can detect up to 30-cm
proximity distance
Sliders
Supports up to two 5-segment sliders
Configures each slider individually as linear or radial
Combines both sliders to form one 10-segment slider
Slider resolution is user-configurable
Proximity Sensors
The CY8CMBR3xxx family supports up to two proximity
sensors with a detection range of up to 30 cm. These proximity
sensors are capable of detecting both proximity and touch
events.
The wake-on-approach feature wakes the devices from a
low-power state to Active mode on a proximity event.
The device also features driven shield, which enhances the
proximity sensing range in the presence of metal objects.
The device supports proximity sensors with CP ranging from
8 pF to 45 pF.
SmartSense Auto-tuning
The CY8CMBR3xxx family features SmartSense Auto-tuning,
Cypress's patented CapSense algorithm, which continuously
compensates for system and environmental changes during run
time. SmartSense Auto-tuning has the following advantages:
Reduces design effort by eliminating manual tuning
Adapts to variations in PCB, overlay, paint, and manufacturing
that degrade touch-sensing performance
Eliminates manual tuning in production
Adapts to changes in the system environment due to noise
Allows a platform design approach with different overlays,
button shapes, and trace lengths
Liquid Tolerance
The CY8CMBR3xxx family delivers water-tolerant designs that
eliminate false touches due to wet conditions, such as water
droplets, moisture, mist, steam, or even wet hands. The
CapSense controller locks up the user interface in firmware to
prevent touch inputs in streaming water.
The CY8CMBR3xxx family offers liquid-tolerance to liquids such
as water, ketchup, oil, and blood.
Enable the shield electrode through the register map, using
EZ-Click, to prevent false touches under wet conditions and
enable both the shield electrode and guard sensor to prevent
false touches in streaming water conditions. The shield electrode
and guard sensor consume a port pin each in the CapSense
controller. Refer to the CY8CMBR3xxx CapSense Design Guide
for best practices and design guidelines for implementing
liquid-tolerant designs.
Noise Immunity
The CY8CMBR3xxx family features the robust CSD PLUS
capacitive sensing algorithm. Additionally, it implements the
advanced noise immunity algorithm, EMC, for stable operation
in extremely noisy conditions.
The EMC algorithm has higher average power consumption. For
low-power applications, where noise conditions are not extreme,
you can disable this feature through the I2C interface.
Flanking Sensor Suppression (FSS)
This feature distinguishes between signals from closely spaced
buttons, eliminating false touches. It ensures that the system
recognizes only the first button touched.
Touch Feedback
The CY8CMBR3xxx family has pins that you can configure for
audio-visual feedback through a buzzer or an LED.
General-Purpose Outputs (GPOs)
The GPOs are high-sink current outputs that can drive most
LEDs. The GPO status can be controlled directly by the
CapSense sensors so that a sensor 'ON' status automatically
turns ON a corresponding LED. Alternatively, GPOs can be
controlled by the host through the I2C interface.
The GPOs also support advanced features, such as:
CSx to GPOx Direct Drive: Directly control the GPOs upon
button touch or proximity event.
Pulse width modulation (PWM): Controls LED brightness.
Toggle: The GPO status is toggled upon every touch event on
the button sensors, and proximity event on proximity sensors,
to mimic the functionality of the mechanical toggle switch.
Voltage output: Analog voltage that represents the button
status.
Buzzer Drive
The output pins of the CY8CMBR3xxx controllers can be
configured for driving a single-input DC Piezo-electric buzzer
through a PWM. The PWM frequency and buzzer activation
duration are configurable. The buzzer output is activated for a
finite amount of time when a finger touch is detected.
Document Number: 001-85330 Rev. *M
Page 6 of 42

6 Page









CY8CMBR3002 pdf, datenblatt
CY8CMBR3002, CY8CMBR3102
CY8CMBR3106S, CY8CMBR3108
CY8CMBR3110, CY8CMBR3116 Datasheet
CY8CMBR3108 (8 Sensing Inputs)
Table 3. Pin Diagram and Definitions - CY8CMBR3108
Pin # Pin Name
Type
16-QFN
Description
If unused
Default
Configuration
Pin Diagram
1 CS0/PS0
– CapSense button / proximity Ground/Ground
sensor, controls GPO0
CS0
2 CS1/PS1
– CapSense button / proximity Ground/Ground
sensor, controls GPO1
CS1
3 CMOD
– External modulator capacitor. NA
Connect 2.2 nF/5 V/X7R or
NPO capacitor
4
VCC
Power Internal regulator output.
NA
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
CMOD
VCC
CS0/PS0
CS1/PS1
CMOD
VCC
1 12
2 QFN 11
3 (Top View) 10
49
CS2/GUARD
CS7/GPO3/SH
CS6/GPO2
CS5/GPO1
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/Refer to Unused
GPO Pin Connection on
page 15
GPO0
9 CS5/GPO1
– CapSense button / GPO
Ground/Refer to Unused
GPO Pin Connection on
page 15
GPO1
10 CS6/GPO2 I/DO CapSense button / GPO
Ground/Refer to Unused
GPO Pin Connection on
page 15
GPO2
11 CS7/GPO3/ I/DO CapSense button / GPO/ shield Refer to Unused SPO Pin
SH electrode.
Connection on page 15
(SPO1 in the register map)
12 CS2/GUARD[6]
– CapSense button, controls
GPO2 / guard sensor
Connect to VDD/Connect
to VDD
GPO3
CS2
13 CS3
– CapSense button, controls
GPO3
Ground
CS3
14 I2C SDA DIO I2C data
Pull up
I2C SDA
15 I2C SCL DIO I2C clock
Pull up
I2C SCL
16 HI/BUZ
DO Host interrupt / buzzer output Refer to Unused SPO Pin
Supply voltage for buzzer and Connection on page 15
pull-up resistor on HI should be
equal to VDDIO
(SPO0 in the register map).
17 Center Pad[5] E-pad Connect to VSS for best
mechanical, thermal and
electrical performance
Floating, not connected to
any other signal
HI
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.
Notes
5. 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.
6. This I/O functions as reset (AXRES) pin during boot-up. Make certain that this pin is not grounded during power-up for the device to boot up properly. After boot-up,
this I/O functions as indicated by the pin name.
Document Number: 001-85330 Rev. *M
Page 12 of 42

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