| ??? 11/22/08 09:28 Read: times |
#160192 - What do *you* think? Responding to: ???'s previous message |
Ravinder Singh said:
pls put some light on this question too.. Rather than just rely on others to do your thinking for you, what do you think might happen? Look at the descriptions of the external memory accesses in Chapter 3 of the so-called "bible" for the 8051; including the timing diagrams - what do you think might happen at the points where it samples the external lines if no memory is physically present...? Also check the Datasheet for your particular device to see if there are any specific variations... Again, those "bible" links: Chapter 1 - 80C51 Family Architecture: http://www.nxp.com/acrobat_d...ARCH_1.pdf Chapter 2 - 80C51 Family Programmer's Guide and Instruction Set: http://www.nxp.com/acrobat_d...UIDE_1.pdf Chapter 3 - 80C51 Family Hardware Description: http://www.nxp.com/acrobat_d...WARE_1.pdf |
| Topic | Author | Date |
| Micro-controller Hang conditions?? | 01/01/70 00:00 | |
| What do you mean by "hang"? | 01/01/70 00:00 | |
| Hang-up vs. lock-up | 01/01/70 00:00 | |
| colloquialisms | 01/01/70 00:00 | |
| hard-and-fast defitionion | 01/01/70 00:00 | |
| Micro-controller Hang conditions?? | 01/01/70 00:00 | |
| What do *you* think? | 01/01/70 00:00 | |
| ?? | 01/01/70 00:00 | |
| Learning to think for oneself | 01/01/70 00:00 | |
| Hand out tools | 01/01/70 00:00 | |
| Unless one is really willing to hand over | 01/01/70 00:00 | |
| Yes! That's the point! | 01/01/70 00:00 | |
| Depends on whether pull-ups are used or not | 01/01/70 00:00 | |
| unexistent external memory | 01/01/70 00:00 | |
| No table | 01/01/70 00:00 | |
I like that analogy! | 01/01/70 00:00 |