Interrupts on the Intel 8051. Presented by: Joe Conner For: Advanced Embedded Systems Design BAE 5030 08/30/04. Overview. Memory Map Interrupts How interrupts are handled Response Time. Memory Map. TCON (0x88 ). IE (0xA8). IP (0xB8). SCON (0x98). Interrupts.
External Interrupts and can be either level or transition activated
Timer 0 and 1 overflow/rollover activated
Serial Port both receive and transmit
Since both TX and RX are the same interrupt, the service routine will have to determine which it was.
All the bits that generate interrupts can be set or cleared by software, with the same results as if they had been set or cleared by hardware.