| ??? 02/11/05 19:25 Read: times |
#87169 - Now I say: HUH Responding to: ???'s previous message |
It is good to read posts from an insider, who has access to the ultimate sources of information. However, Bill's answer raised a few more question: 1. Can you please be specific, which part are you talking about? 2. I thought, the "bible" Erik likes to refer to, is valid for all Philips 8051 derivative. It states, that while performing a MOVX @DPTR, the stong pullup of P2 is on all the time. However, you mention, it is on for 2 clocks. Can you please explain it? 3.You mention, that when switching back to P2, if switching from 0 to 1, strong pullup is activated. I assume, this is only for 2 oscillator clocks - am I right? 4. It is strange to me that at the switchback from address to P2 SFR the strong pullup is activated only when the address bit was 0 (and P2 SFR is 1 of course). What is the reason of not doing so if the address was 1? 5. Although you did not specify it, I assume you are talking about MOVX @DPTR. I originally hd a question, if in case of MOVX @Ri are or are not the P2 strong pullups activated. The "bible" states nothing for this case. Can you please comment on this? Jan Waclawek |
| Topic | Author | Date |
| P2:R0 as memory pointer | 01/01/70 00:00 | |
| Read the cpu data! | 01/01/70 00:00 | |
| P2 readback | 01/01/70 00:00 | |
| Re | 01/01/70 00:00 | |
| Thank you all | 01/01/70 00:00 | |
| Interesting | 01/01/70 00:00 | |
| very well described | 01/01/70 00:00 | |
| This is NOT in the | 01/01/70 00:00 | |
| ch3 pg 6 | 01/01/70 00:00 | |
| none of them | 01/01/70 00:00 | |
| more | 01/01/70 00:00 | |
| An experiment - AT89C8252 | 01/01/70 00:00 | |
| not necessarily | 01/01/70 00:00 | |
| sure not necessarily | 01/01/70 00:00 | |
| talking about memory | 01/01/70 00:00 | |
| MOVX multiplexed with P2 SFR data | 01/01/70 00:00 | |
| Now I say: HUH | 01/01/70 00:00 | |
| huh | 01/01/70 00:00 | |
| Thank you | 01/01/70 00:00 | |
| what datasheet says | 01/01/70 00:00 | |
| I should've RTFM... :-) | 01/01/70 00:00 | |
| not too much logic | 01/01/70 00:00 | |
| sure | 01/01/70 00:00 | |
| The horses mouth | 01/01/70 00:00 | |
| horse is plural | 01/01/70 00:00 | |
| I'd be happy to ... | 01/01/70 00:00 | |
| can't find them | 01/01/70 00:00 | |
As you use to say :) | 01/01/70 00:00 | |
| another note | 01/01/70 00:00 |