Serial Data Transfer (USART) 8251
Subject and UNIT: Microprocessors and Microcontrollers: Unit IV: (d) Serial Data Transfer (USART) 8251
The 8085 microprocessor communicates serially using two lines : SOD and SID. The Serial Output Data (SOD) line is used to send 1-bit data on the SOD Pin of 8085 and RIM instruction is used to receive 1-bit data on the SID pin of 8085.
Subject and UNIT: Microprocessors and Microcontrollers: Unit IV: (d) Serial Data Transfer (USART) 8251
Most of the microprocessors are designed for parallel communication. In parallel communication number of lines required to transfer data depend on the number of bits to be transferred.
Microprocessors and Microcontrollers
Subject and UNIT: Microprocessors and Microcontrollers: Unit IV: (c) Programmable Interval Timer (PIT/C) 8253/8254
Microprocessors and Microcontrollers: Unit IV: (c) Programmable Interval Timer (PIT/C) 8253/8254 : Two Marks Questions with Answers, University Questions with Answers (Long Answered Questions)
Programmable Interval Timer (PIT/C) 8253/8254
Subject and UNIT: Microprocessors and Microcontrollers: Unit IV: (c) Programmable Interval Timer (PIT/C) 8253/8254
Review Question : 1. Draw and explain the interfacing of 8253 with 8085.
Microprocessors and Microcontrollers
Subject and UNIT: Microprocessors and Microcontrollers: Unit IV: (b) Programmable Interrupt Controller (PIC) - 8259
Microprocessors and Microcontrollers: Unit IV: (b) Programmable Interrupt Controller (PIC) - 8259 : Programming Examples
Programmable Interval Timer (PIT/C) 8253/8254
Subject and UNIT: Microprocessors and Microcontrollers: Unit IV: (c) Programmable Interval Timer (PIT/C) 8253/8254
Mode 0 : Interrupt on terminal count
Programmable Interval Timer (PIT/C) 8253/8254
Subject and UNIT: Microprocessors and Microcontrollers: Unit IV: (c) Programmable Interval Timer (PIT/C) 8253/8254
The complete functional definition of the 8253/54 is programmed by the system software. Once programmed, the 8253/54 is ready to perform whatever timing tasks it is assigned to accomplish.
Subject and UNIT: Microprocessors and Microcontrollers: Unit IV: (c) Programmable Interval Timer (PIT/C) 8253/8254
Review Questions 1. Draw and explain the functional block diagram of 8253/54 timer. 2. Discuss the internal architecture of 8253 programmable interval timer. 3. Explain the block diagram of the 8254 timer. 4. Draw and explain the functional block diagram of 8254 timer.
Subject and UNIT: Microprocessors and Microcontrollers: Unit IV: (c) Programmable Interval Timer (PIT/C) 8253/8254
Review Questions : 1. What is the necessity of the programmable interval timer? 2. List the features of any programmable interval timer. 3. List the differences between 8253 and 8254.
Microprocessors and Microcontrollers
Subject and UNIT: Microprocessors and Microcontrollers: Unit IV: (c) Programmable Interval Timer (PIT/C) 8253/8254
The 8253/54 solves one of the most common problem in any microcomputer system - the generation of accurate time delays under software control.
Programmable Interrupt Controller (PIC) - 8259
Subject and UNIT: Microprocessors and Microcontrollers: Unit IV: (b) Programmable Interrupt Controller (PIC) - 8259
Microprocessors and Microcontrollers: Unit IV: (b) Programmable Interrupt Controller (PIC) - 8259 : Two Marks Questions with Answers, University Questions with Answers (Long Answered Questions)
Subject and UNIT: Microprocessors and Microcontrollers: Unit IV: (b) Programmable Interrupt Controller (PIC) - 8259
Review Question : 1. Draw and explain the interfacing of cascaded 8259s with 8085.