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AN2094 - PSoC® 1 - Getting Started with GPIO | Cypress Semiconductor

AN2094 - PSoC® 1 - Getting Started with GPIO

Last Updated: 
Jan 13, 2016

AN2094 discusses relevant topics on general-purpose input and output (GPIO) such as drive modes, shadow registers, and GPIO interrupts to get started with PSoC® 1 GPIOs. This document also provides a few tips and briefs of the other resources associated with PSoC 1 GPIOs.

日本語 !!

The general-purpose input and output (GPIO) is a very critical part of any microcontroller unit (MCU) as it forms the bridge between the external world and the MCU. The type and nature of this external world bridge depends on the end application. For instance, an ADC requires a GPIO to be an analog pin, whereas an I2C or SPI digital communication block requires the same GPIO to be digital. To set up this external world bridge, you need to know the end application and the GPIO system of the MCU that is used. PSoC, like any other controller, has its own GPIO system. This application note discusses the application-specific parameters of the GPIO system. A detailed technical overview of the system is available in the General Purpose I/O chapter of the PSoC Core section in the respective device TRM. 

GPIO Cell structure inside PSoC 1


Example Project

Supported H/W and S/W Supported PSoC1 Devices
PSoC Designer Version H/W Kit CY8C20xxx CY8C21xxx CY8C22xxx CY8C23xxx CY8C24xxx CY8C27xxx CY8C28xxx CY8C29xxx
Yes 5.4 CY3210-PSoCEVAL1 x34 x23, x34


  x23A, x94 x43 x x66



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Translated documents are for reference only. We recommend that you refer to the English-language version of a document if you are engaged in development of a design.