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How to set configuration bits for PIC16f877a?
Configuration Bits are used to enable or disable different hardware features of the microcontroller. These are read during startup/reset and enable or disable different hardware features based on the values of bits.
What are configuration bits in PIC?
Configuration Bits are a collection of binary data located in the Flash program memory of a PIC® microcontroller (MCU). Configuration bits are programmed into the PIC MCU with the application code. These bits are not executable code as their addresses are not accessible by the program counter.
What is configuration Bit?
Configuration bits are a collection of specialized bits that can only be modified at program time. Configuration bits are “read” during reset and enable or disable hardware features in the microcontroller. Configuration bits are not executable code. Essentially, they are fuses located in the program memory space.
What is configuration in microcontroller?
The Configuration Word of a 16 Series PIC microcontroller determines some of the programmable features of the microcontroller, which can be changed only when the device is programmed. This reveals some of the underlying features of the microcontroller.
What is the maximum number of ports available in PIC18 family microcontrollers?
– A PIC18 may have as many as 10 I/O ports. – An I/O port is often multiplexed with one or more peripheral functions. – When a peripheral function is enabled, the I/O pins cannot be used for general- purpose I/O. – Devices with 18 pins and 20 pins have two I/O ports: A and B.
How to set configuration bits of pic16f877a microcontroller?
Procedure for setting the configuration bits of PIC16F877A: MPLAB users can edit these configuration bits by using Configuration Bits tool. Settings will be open now: The features controlled by configuration bits are: It produces a periodic and oscillating waveform (a sine wave or a square wave).
Why is the power up timer active on pic16f877a?
The power-up timer provides a startup delay of 72 ms which allows VDD to rise to an acceptable level. The reset state of the chip is retained as long as the PWRT is active. The PWRT ensures the stability of the supply voltage before the clock gets started.
What are the different clock modes of pic16f877a?
For PIC16F877A, Oscillators have upto 4 different modes: The LP , XT, and HS clock modes require an external crystal or resonator to be connected to the microcontroller.
How are configuration bits set in MPLAB microcontroller?
These bits are “read” during the reset and enable or disable the hardware features of microcontroller. Procedure for setting the configuration bits of PIC16F877A: MPLAB users can edit these configuration bits by using Configuration Bits tool. Settings will be open now: The features controlled by configuration bits are: