CY8C20134, CY8C20234, CY8C20334

CY8C20434, CY8C20534, CY8C20634

Document Number: 001-05356 Rev. *N

Page 4 of 47

Additional System Resources

System Resources 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:

kHz communication over two wires. SPI communication over

three or four wires run at speeds of 46.9 kHz to 3 MHz (lower

for a slower system clock).

falling voltage levels, while the advanced POR (Power On

Reset) circuit eliminates the need for a system supervisor.

capacitive sensing.

(LDO) provides regulation for I/Os. A register controlled bypass

mode enables the user to disable the LDO.

PSoC Device Characteristics

Depending on your PSoC device characteristics, the digital and analog systems can have 16, 8, or 4 digital blocks, and 12, 6, or 4

analog blocks. Table 1 lists the resources available for specific PSoC device groups. The PSoC device covered by this datasheet is

highlighted.

Getting Started

The quickest way to understand PSoC silicon is to read this

datasheet and then use the PSoC Designer Integrated Devel-

opment Environment (IDE). This datasheet 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 Technical Reference Manual for this PSoC

device.

For up-to-date ordering, packaging, and electrical specification

information, see the latest PSoC device datasheets on the web

at http://www.cypress.com.

Application Notes

Application notes are an excellent introduction to the wide variety

of possible PSoC designs and are available at

http://www.cypress.com.

Development Kits

PSoC Development Kits are available online from Cypress at

http://www.cypress.com 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 http://www.cypress.com. 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 http://www.cypress.com and refer to

CYPros Consultants.

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

up to 64

4

16

up to 12

4

4

12

2 K

32 K

CY8C28xxx

up to 44

up to 3

up to 12

up to 44

up to 4

up to 6

up to

12 + 4[1]

1 K

16 K

CY8C27x43

up to 44

2

8

up to 12

4

4

12

256

16 K

CY8C24x94

up to 56

1

4

up to 48

2

2

6

1 K

16 K

CY8C24x23A

up to 24

1

4

up to 12

2

2

6

256

4 K

CY8C23x33

up to 26

1

4

up to 12

2

2

4

256

8 K

CY8C22x45

up to 38

2

8

up to 38

0

4

6[1]

1 K

16 K

CY8C21x45

up to 24

1

4

up to 24

0

4

6[1]

512

8 K

CY8C21x34

up to 28

1

4

up to 28

0

2

4[1]

512

8 K

CY8C21x23

up to 16

1

4

up to 8

0

2

4[1]

256

4 K

CY8C20x34

up to 28

0

0

up to 28

0

0

3[1,2]

512

8 K

CY8C20xx6

up to 36

0

0

up to 36

0

0

3[1,2]

up to

2 K

up to

32 K

Notes

1. Limited analog functionality

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