| ??? 06/04/10 12:05 Read: times |
#176382 - the way to see it Responding to: ???'s previous message |
No I/O function (UART, timer, whatsoever) causes an interrupt!
the UART just set TX, RX, the timers just set TF, ..... Then the processor at certain times in the instruction cycle check these flags and the IE and the previous instruction and possibly decides to vector to an ISR. So, to address your actual question, whatever the EA does, it will never disable the setting of a TF and it will never reset it. Erik |
| Topic | Author | Date |
| Interrupt Hardware checked on SETB EA? | 01/01/70 00:00 | |
| Yes... | 01/01/70 00:00 | |
| the way to see it | 01/01/70 00:00 | |
| so exactly when does the hardware check the interrupt regs | 01/01/70 00:00 | |
| VERY derivative dependent | 01/01/70 00:00 | |
| Datasheet should tell you | 01/01/70 00:00 | |
| ports? machine cycle? | 01/01/70 00:00 | |
Still the datasheet will say. | 01/01/70 00:00 |