Block Diagram Of 16f877a

The timer mode is normally selected by clearing the t0cs bit in the register.

Block diagram of 16f877a. This picture shows the pinout diagram of pic16f877a. Peripheral interface controller pic take a look. Architecture and memory organization of pic 16f877. Block diagram of railway gate control system fig.

The block diagram of timer 0 module is given in the figure below. A 5 1v zener diode in the figure is to prevent v3 v in to rise above 5 1v if the input voltage goes much above 20v. The microcontroller clock is generated by an external 10 mhz crystal. So one pic 16f877a microcontroller is used to operate the following function of the railway gate control system.

To know more basics about pic 16f877 click on the link below. To sense the arrival and departure of the train 2. 1 shows over all block diagrams for railway gate control system by using microcontroller pic 16f877a. The first pin is the master clear pin of this ic.

Take a look. In timer mode when the timer 0 module increases with every instruction cycle the tmr0 register is written the increment is inhibited for the following two instruction cycles. Block diagram of pic based adc module ou cannot feed 20v directly to a pic i o pin you need a resistor divider network that converts 0 20v range into 0 5 v. It resets the microcontroller and is active low meaning that it should constantly be given a voltage of 5v and if 0 v are given then the controller is reset.

Here we discuss the pic 16f877 architecture and its features.