What is 8253 ?
The Intel 8253 is a programmable interval timer or PIT chip. It performs counting and timing functions using three 16-bit counters for the microcomputers. Each counter has two specific input pins and one output pin. These can be programmed to perform the counting process in a binary mode. The modes of the 8253 determine how these counters work and also regulate the one output pin as well.
Advantages
Here are the advantages and disadvantages of 8253 mentioned below.
- Versatility : Both chips offer three independent 16-bit counters that can be programmed for a wide range of timing and counting applications.
- Programmability : The chips allow programmers to set the operating mode of each counter independently, providing flexibility in generating various timing and counting operations.
- Limited Resolution : The 16-bit counters have a limited resolution compared to modern timers, which may not be sufficient for applications requiring very precise timing.
Disadvantages
Here are the disadvantages a mentioned below.
- Complexity : Programming the chips can be complex, especially for users unfamiliar with their operation and various modes.
- Limited Features : Compared to modern timer peripherals integrated into microcontrollers, the 8253 lack advanced features such as PWM (Pulse Width Modulation) generation and input capture.
Differences Between 8253 and 8254
Both 8253 and 8254 are Programmable Interval Timers (PTIs) which are designed to perform different functions like time and counting by using triple 16-bit registers. Both 8253 and 8254 have 2 input pins and 1 output pin. In this article, we are going to discuss the Differences Between 8253 and 8254 in detail.
Table of Content
- What is 8253 ?
- Block Diagram For 8253
What is 8254 ?- Applications
- Block Diagram For 8254
Differences Between 8253 and 8254
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