AN2352 Datasheet | Cypress

.. Application Note I2C-USB Bridge Usage Author: Valeriy Kyrynyuk Associated Project: Yes Associated Part Family: CY8C24894 Software Version: PSo C Designer™ v. 4.3 Associated Application Notes and Kits: AN2304, CY3240-I2USB, CY3242-IOX >> Available in Cypress Online Store Abstract This Application Note, which is included in the CY3240-I2USB kit available in the Cypress Online Store, details several examples using the I2C-USB bridge design. It is also a supplement to the I2C-USB Bridge Quick Start Guide reference [2] at 2 the end of this document, also available in CY3240-I2USB. The Application Note contains details about implementing an I C 2 interface into existing projects and using I C munication to test, debug and tune device designs. Introduction The normal capabilities of a PC can be well expanded upon by using the new I2C-USB bridge and its supporting software. A PC with I2C-USB bridge can be useful for following tasks: - - Debug existing projects (using I2C munication instead of UART, for example). Acquire and manipulate data from various I2C devices, such as ADCs, DACs, IO expanders, sensors with I2C interfaces, etc. Program EEPROM, SRAM devices. Train users and demonstrate I2C device capabilities. 2 The simplest way to implement I C into a PSo C project and attach the device to the bridge will also be looked at closely. This document does not describe the internal structure and protocol of the bridge. For this information refer to the I2C-USB Bridge Guide reference [1] at the end of this document, also available in CY3240-I2USB. The USB2IIC.exe program was used in all examples. Details of this program are described in [2]. Attach Device to Bridge Execute the following steps to connect the device to the I2C-USB bridge: 1. 2. 3. Connect GND of the device to GND of the bridge. Connect the SDA, SCL lines to the bridge (Figure 1). Bridge has 2.2k pull-up resistors connected to +5V. Power the device from the Vdd pin on the...