CY8C20224, CY8C20324
CY8C20424, CY8C20524
Document Number: 001-41947 Rev. *D
Page 3 of 34
Typical Application
Figure 2 illustrates a typical application: CapSense multimedia
keys for a notebook computer with a slider, four buttons, and four
LEDs.
Figure 2. CapSense Multimedia Button-Board Application
Additional System Resources
System Resources, some of which are previously listed, provide
additional capability useful to complete systems. Additional
resources include low voltage detection and power on reset.
Brief statements describing the merits of each system resource
follow.
■ The I2C slave and SPI master-slave module provides 50, 100,
or 400 kHz communication over two wires. SPI communication
over three or four wires runs at speeds of 46.9 kHz to 3 MHz
(lower for a slower system clock).
■ Low Voltage Detection (LVD) interrupts signal the application
of falling voltage levels, while the advanced POR (Power On
Reset) circuit eliminates the need for a system supervisor.
■ An internal 1.8V reference provides an absolute reference for
capacitive sensing.
■ The 5V maximum input, 3V fixed output, low dropout regulator
(LDO) provides regulation for IOs. A register controlled bypass
mode allows the user to disable the LDO.
Getting Started
The quickest way to understand PSoC silicon is to read this data
sheet and then use the PSoC Designer Integrated Development
Environment (IDE). This data sheet is an overview of the PSoC
integrated circuit and presents specific pin, register, and
electrical specifications.
For in depth information, along with detailed programming infor-
mation, see the PSoC® Programmable System-on-Chip
Technical Reference Manual for CY8C28xxx PSoC devices.
For up-to-date ordering, packaging, and electrical specification
information, see the latest PSoC device data sheets on the web
at www.cypress.com/psoc.
Application Notes
Application notes are an excellent introduction to the wide variety
of
possible
PSoC
designs.
They
are
located
here:
www.cypress.com/psoc. Select Application Notes under the
Documentation tab.
Development Kits
PSoC Development Kits are available online from Cypress at
www.cypress.com/shop and through a growing number of
regional and global distributors, which include Arrow, Avnet,
Digi-Key, Farnell, Future Electronics, and Newark.
Training
Free PSoC technical training (on demand, webinars, and
workshops) is available online at www.cypress.com/training. The
training covers a wide variety of topics and skill levels to assist
you in your designs.
Cypros Consultants
Certified PSoC Consultants offer everything from technical
assistance to completed PSoC designs. To contact or become a
PSoC Consultant go to www.cypress.com/cypros.
Solutions Library
Visit our growing library of solution focused designs at
www.cypress.com/solutions. Here you can find various appli-
cation designs that include firmware and hardware design files
that enable you to complete your designs quickly.
Technical Support
For assistance with technical issues, search KnowledgeBase
articles and forums at www.cypress.com/support. If you cannot
find an answer to your question, call technical support at
1-800-541-4736.
[+] Feedback
English ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
