| ??? 11/22/05 08:30 Modified: 11/22/05 08:33 Read: times |
#103975 - yes! Responding to: ???'s previous message |
Andy Neil said:
Sure, the UART hardware can run at 115200 - but is the rest of the processor fast enough to actually process the data at this speed...?? Of course, this is application dependent, but it is not so unlikely that the 16 instruction cycles is enough to feed the UART. For example, if you grab some data into an external memory somehow, then you connect a PC and want to dump them, a typical cycle is something like (omitting initialisations here): Loop: ;cycles
movx @a,dptr ;2
inc dptr ;2
Wait_ti:
jnb ti,Wait_ti ;2
clr ti ;1
mov sbuf,a ;1
djnz r3,Loop ;2
djnz r2,Loop ; 2, but mostly irrelevant
;-----
; 10
Similar process occurs in the opposite direction - e.g. it's quite common that bootloaders first receive a pageful of data into a RAM and then burn them at once into FLASH.
Jan Waclawek |
| Topic | Author | Date |
| 115200 Buad and 8051? | 01/01/70 00:00 | |
| SILabs | 01/01/70 00:00 | |
| 115200 Baud and AT89S51 | 01/01/70 00:00 | |
| standard 52 | 01/01/70 00:00 | |
| throughput?? | 01/01/70 00:00 | |
| Thanks. | 01/01/70 00:00 | |
yes! | 01/01/70 00:00 |