Capacitive Controllers. CY8C20121 Datasheet

CY8C20121 Controllers. Datasheet pdf. Equivalent

CY8C20121 Datasheet
Recommendation CY8C20121 Datasheet
Part CY8C20121
Description One Button and Two Button Capacitive Controllers
Feature CY8C20121; CY8C20111/CY8C20121 CapSense® Express™ – One Button and Two Button Capacitive Controllers Not Recom.
Manufacture Cypress Semiconductor
Datasheet
Download CY8C20121 Datasheet




Cypress Semiconductor CY8C20121
CY8C20111/CY8C20121
CapSense® Express™ – One Button and
Two Button Capacitive Controllers
CapSense® Express™ – One Button and Two Button Capacitive Controllers
Features
Capacitive button input tied to a configurable output
Robust sensing algorithm
High sensitivity, low noise
Immunity to RF and AC noise
Low radiated EMC noise
Supports wide range of input capacitance, sensor shapes,
and sizes
Target Applications
Printers
Cellular handsets
LCD monitors
Portable DVD players
Industry's best configurability
Custom sensor tuning
Output supports strong 20 mA sink current
Output state can be controlled through I2C or directly from
CapSense input state
Run time reconfigurable over I2C
Advanced features
Plug-and-play with factory defaults – tuned to support up to
1 mm overlay
Nonvolatile storage of custom settings
Easy integration into existing products – configure output to
match system
No external components required
World class free configuration tool
Wide range of operating voltages
2.45 V to 2.9 V
3.10 V to 3.6 V
4.75 V to 5.25 V
I2C communication
Supported from 1.8 V
Internal pull-up resistor support option
Data rate up to 400 kbps.
Configurable I2C addressing
Industrial temperature range: –40 °C to +85 °C
Available in 8-pin SOIC package
Overview
The CapSense® Express™ controllers support two capacitive
sensing (CapSense) buttons and two general purpose outputs in
CY8C20121 and one CapSense button and one general
purpose output in CY8C20111. The device functionality is
configured through the I2C port and can be stored in on-board
nonvolatile memory for automatic loading at power on. The
digital outputs are controlled from CapSense inputs in factory
default settings, but are user configurable for direct control
through I2C.
The four key blocks that make up the CY8C20111 and
CY8C20121 controllers are: a robust capacitive sensing core
with high immunity against radiated and conductive noise,
control registers with nonvolatile storage, configurable outputs,
and I2C communications. The user can configure registers with
parameters needed to adjust the operation and sensitivity of the
CapSense buttons and outputs and permanently store the
settings. The standard I2C serial communication interface allows
the host to configure the device and read sensor information in
real time. I2C address is fully configurable without any external
hardware strapping.
Errata: For information on silicon errata, see “Errata” on page 41. Details include trigger conditions, devices affected, and proposed workaround.
Cypress Semiconductor Corporation • 198 Champion Court
Document Number: 001-53516 Rev. *M
• San Jose, CA 95134-1709 • 408-943-2600
Revised May 19, 2016



Cypress Semiconductor CY8C20121
CY8C20111 Digital Logic Diagram
CY8C20111/CY8C20121
LOGICAL_OPR_INPUT0 [0]
ENB
CS0
OP_SEL_0 [0]
CY8C20121 Digital Logic Diagram
OUTPUT_PORT [0]
INVERSION
LOGIC
A
AND / OR
Logic selection
DIG0
B
S
OP_SEL_0 [1]
OP_SEL_0 [7]
LOGICAL_OPR_INPUTx [0]
ENB
CS0
LOGICAL_OPR_INPUTx [1]
ENB
CS1
INPUT SELECTION LOGIC
A
AND / OR
Logic selection
B
S
OP_SEL_x [0]
OUTPUT_PORT [x]
INVERSION
LOGIC
A
AND / OR
Logic selection
DIGx
B
S
OP_SEL_x [1]
OP_SEL_x [7]
Document Number: 001-53516 Rev. *M
Page 2 of 44



Cypress Semiconductor CY8C20121
CY8C20111/CY8C20121
Contents
Pinouts .............................................................................. 4
Pin Definitions .................................................................. 4
Pinouts .............................................................................. 5
Pin Definitions .................................................................. 5
Typical Circuits ................................................................. 6
Operating Modes .............................................................. 9
Normal Mode ............................................................... 9
Setup Mode ................................................................. 9
I2C Interface ...................................................................... 9
I2C Device Addressing ................................................ 9
I2C Clock Stretching .................................................... 9
Format for Register Write and Read ......................... 10
Registers ......................................................................... 10
Register Conventions ................................................ 10
Register Map ............................................................. 11
CapSense Express Commands ................................ 12
OUTPUT_STATUS ................................................... 13
OUTPUT_PORT ........................................................ 13
CS_ENABLE ............................................................. 13
DIG_ENABLE ............................................................ 14
SET_STRONG_DM .................................................. 14
OP_SEL_x ................................................................. 15
LOGICAL_OPR_INPUTx .......................................... 15
CS_NOISE_TH ......................................................... 16
CS_BL_UPD_TH ....................................................... 16
CS_SETL_TIME ........................................................ 16
CS_OTH_SET ........................................................... 17
CS_HYSTERISIS ...................................................... 17
CS_DEBOUNCE ....................................................... 18
CS_NEG_NOISE_TH ................................................ 18
CS_LOW_BL_RST .................................................... 18
CS_FILTERING ......................................................... 19
CS_SCAN_POS_x .................................................... 19
CS_FINGER_TH_x ................................................... 20
CS_IDAC_x ............................................................... 20
I2C_ADDR_LOCK ..................................................... 20
DEVICE_ID ............................................................... 21
DEVICE_STATUS ..................................................... 21
I2C_ADDR_DM ......................................................... 22
CS_READ_BUTTON ................................................. 22
CS_READ_BLx ......................................................... 23
CS_READ_DIFFx ...................................................... 23
CS_READ_RAWx ..................................................... 23
CS_READ_STATUS ................................................. 24
COMMAND_REG ...................................................... 24
Layout Guidelines and Best Practices ......................... 26
Operating Voltages ......................................................... 27
CapSense Constraints ................................................... 27
Absolute Maximum Ratings .......................................... 28
Operating Temperature .................................................. 28
Electrical Specifications ................................................ 29
DC Electrical Specifications ...................................... 29
CapSense Electrical Characteristics ......................... 31
AC Electrical Specifications ....................................... 31
Appendix ......................................................................... 33
Examples of Frequently Used I2C Commands ......... 33
Ordering Information ...................................................... 34
Ordering Code Definitions ......................................... 34
Thermal Impedances ...................................................... 34
Solder Reflow Specifications ........................................ 34
Package Diagram ............................................................ 35
Acronyms ........................................................................ 36
Document Conventions ................................................. 36
Units of Measure ....................................................... 36
Numeric Conventions ................................................ 36
Glossary .......................................................................... 37
Errata ............................................................................... 41
CY8C20111/121 ........................................................ 41
Document History Page ................................................. 42
Sales, Solutions, and Legal Information ...................... 44
Worldwide Sales and Design Support ....................... 44
Products .................................................................... 44
PSoC® Solutions ...................................................... 44
Cypress Developer Community ................................. 44
Technical Support ..................................................... 44
Document Number: 001-53516 Rev. *M
Page 3 of 44





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