| ??? 09/27/12 17:19 Read: times |
#188472 - It's a mistake I've seen a time or two ... Responding to: ???'s previous message |
Sometimes, when components are changed, people make this mistake.
The remaining issue is probably the nOE at the SRAM. If the data bus is steered properly then the only really critical item aside from the question about the latched low-order address byte would be the persistence of the address bus, from which the output enable probably would be decoded. Now, if you're doing as some do, namely, driving the SRAM's nOE from a port, perhaps that's where the issue arises. RE |
| Topic | Author | Date |
| SRAM issues | 01/01/70 00:00 | |
| Setup and hold times? | 01/01/70 00:00 | |
| RAM issues | 01/01/70 00:00 | |
| Or narrow pulses ? | 01/01/70 00:00 | |
| Address setup time | 01/01/70 00:00 | |
| did you change the arbitration? | 01/01/70 00:00 | |
| Ram issues | 01/01/70 00:00 | |
| P0, P2 for memory only, or ... | 01/01/70 00:00 | |
| p0 and p2 | 01/01/70 00:00 | |
| If you latch both P0 and P2, there will be stabile A15-A0 | 01/01/70 00:00 | |
| Arbitration circuit | 01/01/70 00:00 | |
| It's a bit tricky synchronizing an 805x with 68k series | 01/01/70 00:00 | |
| you are using a latch, and not a flipflop, right? | 01/01/70 00:00 | |
| FF or latch | 01/01/70 00:00 | |
| It's a mistake I've seen a time or two ... | 01/01/70 00:00 | |
| time wasting | 01/01/70 00:00 | |
| no circuit diagram | 01/01/70 00:00 | |
You don't have to do that | 01/01/70 00:00 |