User manual

CY8C24223A, CY8C24423A
Document Number: 38-12029 Rev. *H Page 5 of 34
Additional System Resources
System Resources, some of which have been previously listed,
provide additional capability useful for complete systems.
Additional resources include a multiplier, decimator, low voltage
detection, and power on reset. Brief statements describing the
merits of each system resource follow:
■ Digital clock dividers provide three customizable clock
frequencies for use in applications. The clocks can be routed
to both the digital and analog systems. Additional clocks can
be generated using digital PSoC blocks as clock dividers.
■ A multiply accumulate (MAC) provides a fast 8-bit multiplier
with 32-bit accumulate, to assist in both general math as well
as digital filters.
■ The decimator provides a custom hardware filter for digital
signal processing applications including the creation of Delta
Sigma ADCs.
■ The I
2
C module provides 0 to 400 kHz communication over two
wires. Slave, master, and multi-master modes are all
supported.
■ Low Voltage Detection (LVD) interrupts can signal the
application of falling voltage levels, while the advanced POR
(Power On Reset) circuit eliminates the need for a system
supervisor.
■ An internal 1.3V voltage reference provides an absolute
reference for the analog system, including ADCs and DACs.
PSoC Device Characteristics
Depending on your PSoC device characteristics, the digital and
analog systems can have a varying number of digital and analog
blocks. The following table lists the resources available for
specific PSoC device groups. The PSoC device covered by this
data sheet is highlighted in Ta bl e 1.
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
details, see the PSoC® Programmable System-on-Chip
Technical Reference Manual for CY8C24x23A 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.
Table 1. PSoC Device Characteristics
PSoC Part
Number
Digital
I/O
Digital
Rows
Digital
Blocks
Analog
Inputs
Analog
Outputs
Analog
Columns
Analog
Blocks
SRAM
Size
Flash
Size
CY8C29x66
[2]
up to
64
4 16 12 4 4 12 2K 32K
CY8C27x43 up to
44
2 8 12 4 4 12 256
Bytes
16K
CY8C24x94 64 1 4 48 2 2 6 1K 16K
CY8C24x23A
[2]
up to
24
1 4 12 2 2 6 256
Bytes
4K
CY8C23x33 up to 1 4 12 2 2 4 256
Bytes
8K
CY8C21x34
[2]
up to
28
1428024
[3]
512
Bytes
8K
CY8C21x23
16 1 4 8 0 2 4
[3]
256
Bytes
4K
CY8C20x34
up to
28
0 0 28 0 0 3
[3, 4]
512
Bytes
8K
Notes
2. Automotive qualified devices available in this group.
3. Limited analog functionality.
4. Two analog blocks and one CapSense™ block.
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