ADC0804 Family: The ADC0804 Family are ADC0803, ADC0804 and ADC0805 are CMOS 8-bit successive-approximation analog to digital converters. These devices are design to operate from common microprocessor control buses, with tri-state output latches driving the…

DAC0830 Digital to Analog Converter: The DAC0830 Digital to Analog Converter is an advanced CMOS 8-bit DAC designed to interface directly with the 8080, 8048, 8085, Z80, and other popular microprocessors. A deposited silicon-chromium R-2R…

IC 1408 DAC Pin Diagram: The IC 1408 DAC Pin Diagram is an 8 bit R/2R ladder type D/A converter compatible with TTL and CMOS logic. It is designed to use where the output current…

8279 Keyboard Display Controller Interfacing with 8085: Fig. 14.98 shows the 8279 Keyboard Display Controller Interfacing with 8085 in I/O mapped I/O technique. Here RD and WR signals are activated when IO/M signal is high,…

Operating Modes of 8279: The Operating Modes of 8279 provides 3 basic input modes : Scanned keyboard Scanned sensor matrix Strobed input Scanned Keyboard: In this mode, keyboard can be scaned in two ways :…

8279 Block Diagram: Fig. 14.84 shows the 8279 Block Diagram. It consists of four main sections CPU interface and control section Scan section 8279 Keyboard section Display section 1.CPU Interface and Control Section: This section…

Pin Diagram of 8279: Fig. 14.83 shows functional and pin diagram of 8279. It is a 40 pin device and looking at Fig. 14.83 (a) we can see that these pins are divided in four…

8259 Programmable Interrupt Controller: The 8259 Programmable Interrupt Controller requires two types of command words. Initialization Command Words (ICWs) and Operational Command Words (OCWs). The 8259 Programmable Interrupt Controller can be initialized with four ICWs;…

Interfacing 8259 with 8085: Fig. 14.72 shows Interfacing 8259 with 8085 microprocessor system. Addressing of 8259A : The 74LS138 address decoder will assert the CS input of the 8259A when an I/O base address is…