Application Notes - Cypress.com

AN76530 - PSoC® 1 Automotive Ultrasonic Distance Measurement for Park Assist Systems

Tue, 02 Apr 2013 00:44:45 -0600

This application note explains how Cypress’s PSoC is the best fit for UPA applications; it includes an example project and reference hardware design.

Introduction

Ultrasonic parking assistance (UPA) systems are increasingly popular in cars because they enhance safety and driver convenience, especially in large cities. This application note shows you how to create an ultrasonic distance measurement system using enclosed ultrasonic transducers, which are typical in automotive applications.

AN75813 - H Bridge Based Motor Drive Protection Using PSoC® 3

Tue, 04 Dec 2012 13:38:05 -0600

Introduction:

H-Bridge driven DC motors are widely used in many automotive applications such as HVAC, power seats, wipers, and power windows. It is important to protect the motor drive system, because failure to do so may result in damaged components and, in some cases, hazardous conditions. In this application note, we discuss a novel approach to fault detection and protection where, instead of using pre-packaged motor drivers with built-in protection systems, we use basic components such as FETs and gate drivers. This method results in a larger number of available test signals and hence better determination of fault conditions. Combined with the configurability of PSoC 3 devices, this method also leads to a scalable and programmable system that can be easily shared across multiple H-Bridges.

The following table indicates the PSoC devices, PSoC Creator versions, compilers, and development kits that will work with this application note project:

Device		PSoC Creator Version		Supported Development Kit CY8CKIT-				Supported Compiler
Architecture	Silicon Rev	V 1.0	V2.0	001 DVK	030 DVK	050 DVK	003 / 014 FTK	Keil	GCC	RVDS	MDK
PSoC 3	ES2	No	No	No	N/A	N/A	No	No	N/A	N/A	N/A
PSoC 3	ES3 / Rev A	No	Yes	Yes	Yes	N/A	No	Yes	N/A	N/A	N/A

The projects associated with this application note, one for CY8CKIT-001 and another for CY8CKIT-030, can be downloaded from the ‘Related Files’ section below.

AN4017 - Understanding Temperature Specifications: An Introduction

Wed, 08 Aug 2012 23:16:56 -0600

The following application note is intended to give the reader a basic understanding of the temperature specifications found in Cypress's product datasheets. There are many factors that affect the thermal operation of a device. This application note provides the reader with enough background to understand the thermal parameters and temperature specifications of the device.

This document describes the various thermal parameters namely Ambient Temperature (T_a), Case Temperature (T_c), Junction Temperature(T_j), Thermal Resistance, Power Dissipation etc.

Details on calculating Junction Temperature are provided in this application note.

Clicking on the link below provides a tool which enables calculation of the I/O Switching Current (I_ddq) for desired frequency, Total Power Consumption and Junction Temperature for Sync SRAMs

http://www.cypress.com/?docID=23984

Please refer to the respective product datasheets to get the V_dd voltage and I_dd current used in the formula.

Single Versus Multiple Transaction Translator - AN1071

Thu, 28 Apr 2011 00:00:00 -0600

High-speed USB 2.0 hubs have a component to provide communication to full-speed and low-speed devices when the hub is operating at high-speed. This component is called a transaction tanslator (TT). The USB 2.0 specification allows two different implementations: one TT for all downstream ports (TT/hub) or one TT for each downstream port (TT/port). The TetraHub™ (CY7C65640B), which is a four-port high-speed hub, provides you with the option of using this part in a single TT (TT/Hub) or multiple TT (TT/Port) mode. This application note presents the differences and advantages of using multiple TT high-speed hubs versus a single TT high-speed hub.