Cypress CY8C20x46, CY8C20396, CY8C20x36, CY8C20x66 Getting Started, Additional System Resources

CY8C20x36/46/66, CY8C20396

Additional System Resources

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.

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 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 application 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.

Document Number: 001-12696 Rev. *D Page 4 of 34

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