#IAR 8051 MEMORY LIMIT SERIAL#
REGISTER CONFIGURATION (for interrupt selection): Now we have to specify the microcontroller that which interrupts must be served. INTERRUPTS ENABLE (IE) REGISTER 8051 Microcontroller The interrupt vector table location 0023H belongs to this interrupt. When enabled, it notifies the controller whether a byte has been received or transmitted. It has a single interrupt that belongs to both receive and transmit.
#IAR 8051 MEMORY LIMIT CODE#
The code written on that memory area by the programmer starts its execution. Then it jumps to the memory location which is specified by Interrupt Vector Table (IVT). When an interrupt occurs, the controller transfers the content of the program counter onto the stack. The Interrupt Vector Table contains the starting address of the memory location of every interrupt.
8051 microcontroller Interrupt ServiceĪ fixed memory area is assigned for each interrupt inside the microcontroller. These external interrupts can be edge-triggered or level triggered. Timers and Serial interrupts are internally generated by the microcontroller while the external interrupts are generated when externally interfacing devices or switches are connected to the microcontroller. The interrupts sources present in 8051 microcontrollers are: