| ??? 03/13/10 13:19 Read: times |
#174114 - I bet you can't Responding to: ???'s previous message |
Controlling /EA with a port pin?
Any derivative I can think of samples !EA at reset and ignores it afterwards. I may lose this bet, but doubt it - check your devices datasheet Thus, for your scheme to work, you need to reset the processor (at which time the port pin goes high) and sample the !EA OOPS. I guess you can do it with an external flip/flop Erik |
| Topic | Author | Date |
| Controlling /EA with a port pin? | 01/01/70 00:00 | |
| Why would you want do this?? | 01/01/70 00:00 | |
| Allowing system upgrades via MIDI sysex in the field | 01/01/70 00:00 | |
| So why on an 8051? | 01/01/70 00:00 | |
| Challenge?? | 01/01/70 00:00 | |
| Old fashioned 8031 dev boards | 01/01/70 00:00 | |
| Helpful points | 01/01/70 00:00 | |
| Good match | 01/01/70 00:00 | |
Budget | 01/01/70 00:00 | |
| See value to an extent... | 01/01/70 00:00 | |
| Internal XDATA addresable as XCODE? | 01/01/70 00:00 | |
| Executing code from XRAM | 01/01/70 00:00 | |
| Code in OnBoard XRAM | 01/01/70 00:00 | |
| Don't overlook other options ... | 01/01/70 00:00 | |
| FX2 | 01/01/70 00:00 | |
| I bet you can't | 01/01/70 00:00 | |
| Ideally a single chip design | 01/01/70 00:00 |