Control Signals of 8085

Control Signals of 8085: The 8085 Microprocessor provides RD and WR signals to initiate read or write cycle. Because these Control Signals of 8085 are used both for reading/writing memory…

Continue Reading Control Signals of 8085

Power on Reset Circuit of 8085

Power on Reset Circuit in 8051: On reset, the PC sets to 0000H which causes the 8085 to execute the first instruction from address 0000H. For proper reset operation reset…

Continue Reading Power on Reset Circuit of 8085

Interfacing 8259 with 8085

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…

Continue Reading Interfacing 8259 with 8085

Interfacing of 8257 with 8085

Interfacing of 8257 with 8085: Fig. 14.68 shows the interfacing of 8257 with 8085 in I/O mapped I/O technique. In slave mode, RD and WR signals are activated by CPU…

Continue Reading Interfacing of 8257 with 8085

Interfacing 8251 with 8085

Interfacing 8251 with 8085: Fig. 14.44 shows the Interfacing 8251 with 8085 in I/O mapped I/O technique. Here, RD and WR signals are activated by CPU when IO/M signal is…

Continue Reading Interfacing 8251 with 8085

8085 Interrupts in Microprocessor Articles

8085 Interrupts in Microprocessor Articles: Polling and Interrupts : In Polling and Interrupts of the microprocessor’s software simply checks each of the I/O devices every so often. During this check,…

Continue Reading 8085 Interrupts in Microprocessor Articles

Types of Interrupts in 8085

Types of Interrupts in 8085: The 8085 has multilevel interrupt system. It supports two Types of Interrupts in 8085: Hardware     Software Hardware : Some pins on the 8085 allow, peripheral…

Continue Reading Types of Interrupts in 8085