CY8C20110
Document Number: 001-17345 Rev. *B
Page 5 of 12
The CapSense Analog System
The CapSense analog system contains the capacitive sensing
hardware. The CapSense Successive Approximation (CSA)
algorithm is supported. This hardware performs capacitive
sensing and scanning without external components. Capacitive
sensing is configurable on each pin.
Additional System Resources
System Resources provide additional capability useful to
complete systems. Additional resources are low voltage
detection and Power On Reset (POR).
■ The I
2C slave provides 50, 100, or 400 kHz communication
over two wires.
■ Low Voltage Detection (LVD) interrupts signal the application
of falling voltage levels and the advanced POR circuit elimi-
nates the need for a system supervisor.
An internal 1.8V reference provides an absolute reference for
capacitive sensing.
I2C Interface
The two modes of operation for the I2C interface are:
■ Device register configuration and status read or write for
controller
■ Command execution
The I2C address is programmable during configuration. It can be
locked to prevent accidental change by setting a flag in a config-
uration register.
CapSenseLITE Software Tool
An easy to use software tool integrated with PSoC Express is
available for configuring and tuning CapSenseLITE devices.
Refer to the Application Note AN42137 for details of the software
tool.
Electrical Specifications
Absolute Maximum Ratings
Parameter
Description
Min
Typ
Max
Unit
Notes
TSTG
Storage temperature
–55
25
+100
°C
Higher storage temperatures reduce
data retention time. Recommended
storage temperature is +25°C ± 25°C.
Extended duration storage tempera-
tures above 65°C degrades reliability.
TA
Ambient temperature with power
applied
–40
–
+85
°C
VDD
Supply voltage on VDD relative to VSS
–0.5
–
+6.0
V
VIO
DC input voltage
VSS – 0.5
–
VDD + 0.5
V
VIOZ
DC voltage applied to tri-state
VSS – 0.5
–
VDD + 0.5
V
IMIO
Maximum current into any GPIO pin
–25
–
+50
mA
ESD
Electrostatic discharge voltage
2000
–
-
V
Human body model ESD
LU
Latch up current
-
–
200
mA
Operating Temperature
Parameter
Description
Min
Typ
Max
Unit
Notes
TA
Ambient temperature
–40
–
+85
ºC
TJ
Junction temperature
–40
–
+100
ºC
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