Cypress CY8C20396 Manual De Usuario

Document Number: 001-12696  Rev. *D

Page 4 of 34

System Resources, some of which are listed in the previous
sections, provide additional capability useful to complete
systems. Additional resources include low voltage detection and
power on reset. The merits of each system resource are listed
here:

■

The I2C slave/SPI master-slave module provides 50/100/400 
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).

■

The I2C hardware address recognition feature reduces the 
already low power consumption by eliminating the need for 
CPU intervention until a packet addressed to the target device 
is received.

■

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 reference provides an absolute reference for capac-
itive sensing.

■

The 5.5V maximum input, 1.8/2.5/3V-selectable output, low-
dropout regulator (LDO) provides regulation for IOs. A register-
controlled bypass mode allows the user to disable the LDO.

■

Standard Cypress PSoC IDE tools are available for debugging 
the CY8C20x36/46/66, CY8C20396 family of parts. However, 
the additional trace length and a minimal ground plane in the 
Flex-Pod can create noise problems that make it difficult to 
debug a Power PSoC design. A custom bonded On-Chip 
Debug (OCD) device is available in an 48-pin QFN package. 
The OCD device is recommended for debugging designs that 
have high current and/or high analog accuracy requirements. 
The QFN package is compact and is connected to the ICE 
through a high density connector.

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 CY8C28xxx PSoC devices.

www.cypress.com/psoc

.

Application notes are an excellent introduction to the wide variety
of possible PSoC designs. They are located here:

. Select Application Notes under the

Documentation tab.

PSoC Development Kits are available online from Cypress at

 and through a growing number of

regional and global distributors, which include Arrow, Avnet, Digi-
Key, Farnell, Future Electronics, and Newark.

www.cypress.com/training

. The

training covers a wide variety of topics and skill levels to assist
you in your designs.

www.cypress.com/cypros

.

Visit our growing library of solution focused designs at

. Here you can find various

application designs that include firmware and hardware design
files that enable you to complete your designs quickly.

For assistance with technical issues, search KnowledgeBase
articles and forums at

. If you cannot

find an answer to your question, call technical support at 1-800-
541-4736.