赛普拉斯半导体公司日前为其飞速发展的PSoC混合信号阵列推出了两款新型评估套件。这两款最新上市的套件专为热释电红外（PIR）运动探测及I2C端口拓展而设计，为设计者提供了简便易用的设计工具，协助他们迅速而高效地完成基于PSoC的多种应用设计。

The PCAL6408A is an 8-bit general purpose I/O expander that provides remote I/O expansion for most microcontroller families via the I²C-bus interface. The PCAL6408A is an 8-bit general purpose I/O ...

This 16-bit I/O expander for the two-line bidirectional bus (I2C) is designed to provide general-purpose remote I/O expansion for most microcontroller families via the I2C interface [serial clock (SCL ...

前面说的“ I2C 七宗罪第一罪”和复位有关系， 这一次我们来说说： I2C和电源的关系 提到电源大家的心理通常是紧张滴，不自觉地发问：是不是问题很严重？是的， 非常严重， 而且通过软件是没有办法解决的。我们先来看下面这张简图： 4.DC-DC产生VCC-3.3V分别 ...

The MCP23017, a 16-bit I2C GPIO expander, has always been a tasty chip. With 16 GPIOs addressable over I2C, proper push/pull outputs, software-enabled pull-ups, eight addresses, maskable interrupts ...