Add USB to Anything. Abstract: The MAX3420E makes it easy to design a USB peripheral using a general-purpose microcontroller. After introducing the MAX3420E, this article focuses on the device's SPI interface. The article demonstrates how to access the device either by using a hardwired SPI unit or by bit-banging general-purpose I/O pins. TTL + CMOS Chips & Logic - Мозилин фајерфокс (Mozilla Firefox) Pulse and Digital Circuits - Prakash Rao - Google Books - Мозилин фајерфокс (Mozilla Firefox) Logic Gates - Basic Electronic Tutorials - Мозилин фајерфокс (Mozilla Firefox) While the binary numeration system is an interesting mathematical abstraction, we haven't yet seen its practical application to electronics.
This chapter is devoted to just that: practically applying the concept of binary bits to circuits. What makes binary numeration so important to the application of digital electronics is the ease in which bits may be represented in physical terms. Because a binary bit can only have one of two different values, either 0 or 1, any physical medium capable of switching between two saturated states may be used to represent a bit.