How many pins are in PIC16F84A in oscillation?
PIC16F84a Pinout The PIC16F84a comes with two packages called PDIP and SSOP and both contain 18 and 20 pins respectively. SSOP contains extra ground and voltage supply pins.
What is the purpose of the W register in the PIC16F84A microcontroller?
It is used to configure port B pins as inputs/outputs. W Register: This is the general purpose register accessible by program. You can write values directly only into W register.
How many memory banks are there in a PIC16F84A?
The PIC16F84A has two banks. This memory is divided into two sections. The first 12 bytes (00h-0Bh) of each bank are called SFR (Special Function Registers) and are used to record the operating states of the PIC, the input/output (I/O) port conditions and other conditions.
What is the purpose of the Trisa and Trisb in the PIC16F84A microcontroller?
The first allows us to come back to Bank 0, TRISA allows us to select which pins on Port A are output and which are input, TRISB allows us to select which pins on Port B are output and which are input.
What is W register?
The W register is a special register in the PIC architecture, that is used as one of the 2 operands for ALU operations, and can also be the destination for any ALU operation. In PIC18 devices, the W register is also mapped in RAM and can be accessed through the WREG special function register.
What are the pic16f84a ports?
Port A: contains 5 pins which are 1, 2, 3, 17 & 18 on pinout or RA0, RA1,RA2,RA3,RA4. Port B: contains 8 pins which are 6, 7, 8, 9, 10, 11, 12 & 13 or RB0, RB1, RB2, RB3, RB4, RB5, RB6, RB7. Pin 4: This is an active low pin known as MCLR (Memory Clear). Obviously, this pin is used to reset the device .
How many pins does a pic16f84a IC?
Features: 13 I/O pins – You can configure the 13 pins either as input or output individually.
How many I O ports are placed in microcontroller 8051?
4 I/O ports
8051 microcontrollers have 4 I/O ports each of 8-bit, which can be configured as input or output. Hence, total 32 input/output pins allow the microcontroller to be connected with the peripheral devices. Pin configuration, i.e. the pin can be configured as 1 for input and 0 for output as per the logic state.