| ??? 12/02/09 15:45 Read: times |
#171404 - I have a schematic Responding to: ???'s previous message |
of the (original) circuit. And the 8021 has a PROG signal at pin 3 (it's n/c). Mind you it says there is also an ALE signal at pin 12 (also n/c) and I don't know how that can be... maybe it's also for programming?
Edit: Elsewhere on the web that is an 8021 "programming card" (remember those?) and it shows pin 3 as PSEN (an output) and pin 12 as ALE (also an output). Kind of makes you wonder if there was a piggy-back ROM mode or something. http://archive.comlab.ox.ac.uk/cards/cards.html |
| Topic | Author | Date |
| Anyone work with the 8048? | 01/01/70 00:00 | |
| Info | 01/01/70 00:00 | |
| I did not have to pay... | 01/01/70 00:00 | |
| about those MCU's | 01/01/70 00:00 | |
| can the ROM be read? | 01/01/70 00:00 | |
| I have a schematic | 01/01/70 00:00 | |
| Datasheet? | 01/01/70 00:00 | |
| the "PROG" pin has other purpose | 01/01/70 00:00 | |
| production testing | 01/01/70 00:00 | |
| silly me | 01/01/70 00:00 | |
| Looks Good! | 01/01/70 00:00 | |
| doesn't the datasheet make that clear enough? | 01/01/70 00:00 | |
| I Have Data | 01/01/70 00:00 | |
| I will email you | 01/01/70 00:00 | |
| Host An FTP Transfer | 01/01/70 00:00 | |
| He has to get the file to you | 01/01/70 00:00 | |
| That's what the FTP site is for! | 01/01/70 00:00 | |
| Site Setup. | 01/01/70 00:00 | |
| Email Undeliverable | 01/01/70 00:00 | |
| uploaded | 01/01/70 00:00 | |
More old interesting intel stuff | 01/01/70 00:00 |