| ??? 05/04/08 16:17 Read: times |
#154381 - why diff. method to read 9051 port |
why we use two different methods to read the ports in 8051 microcontroller, one is to read port pin in case of instructions where we have to make only read operation.
for example:- mov a,p1 second is to read port latch in case of instructions where we have to make 'READ-MODIFY-WRITE' operation. for example:- anl p1,a |
| Topic | Author | Date |
| why diff. method to read 9051 port | 01/01/70 00:00 | |
| because .... | 01/01/70 00:00 | |
Another example of R-M-W | 01/01/70 00:00 |