CY8CMBR2110-24LQXI Ver la hoja de datos (PDF) - Cypress Semiconductor
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CY8CMBR2110-24LQXI Datasheet PDF : 71 Pages
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CY8CMBR2110
Device Features
CapSense Buttons
■ Supports up to 10 CapSense buttons
■ Ground the CSx pin to disable CapSense button input
■ Connect a 2.2-nF (±10%) capacitor on the CMOD pin for proper
CapSense operation
■ For proper CapSense operation, ensure CP of each button is
less than 40 pF
SmartSense Auto-Tuning
■ Supports auto-tuning of CapSense parameters
■ Does not require manual tuning; all parameters are automati-
cally tuned by the device
■ Reduces the design cycle time
❐ No manual tuning
■ Ensures portability of the user interface design
■ Compensates printed circuit board (PCB) variations, device
process variations, and PCB vendor changes
General Purpose Outputs (GPOs)
■ GPOx pin outputs are strong drive[3]
■ The GPOx is controlled by the corresponding CSx
■ Active low output – supports sinking configuration for LEDs
(see Figure 3)
■ If CSx is disabled (grounded), then the corresponding GPOx
must be left floating
■ After power-up on the GPOx, a 5-ms pulse is sent after 350 ms
(if Noise Immunity level is “Normal”) and 1000 ms (if Noise
Immunity level is “High”), if the CSx fails the System
Diagnostics
Figure 3. Example of GPO0 Driven by CS0
Button Button
Touched Released
CS0
GPO0
Table 2. CY8CMBR2110 Advanced Features
Feature
Benefits
Toggle ON/OFF
Button retains state after touch (ON/OFF)
Flanking Sensor Suppression (FSS)
Avoids multiple button trigger in a design with closely-spaced buttons
Noise Immunity
Improves device immunity to external noise (such as RF noise)
Automatic Threshold
Configurable finger threshold for different noise settings
LED ON Time
Gives an LED effect on button release
Button Auto Reset
Disables false output trigger when the conducting object is placed close to the button
Power-on LED Effects and Button Touch LED Provides visual effects to design at power-on and button touch
Effects
Standby Mode LED Brightness
Used for LED backlighting
Latch Status Read
No button touch missed by host processor
Attention/Sleep Line to Host
Provides device interrupt to host. Host can use this to read data from the device.
Also controls device operating mode.
Analog Voltage Support
External resistors can be used with GPOs to generate analog voltage output
Sensitivity Control
Maintains optimal button performance for different overlay and noise conditions
Debounce Control
Prevents false trigger of buttons
Buzzer Signal Output
Host Controlled GPOs
Provides audio feedback on button touch
GPO pins, which can be controlled by the host processor through I2C
System Diagnostics
Supports production testing and debugging
Low-Power Sleep Mode and Deep Sleep Mode Low power consumption
Note
3. When a pin is in strong drive mode, it is pulled up to VDD when the output is HIGH and pulled down to Ground when the output is LOW.
Document Number: 001-74494 Rev. *B
Page 7 of 71
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