| ??? 01/17/05 10:28 Read: times |
#85078 - Another CPU? Responding to: ???'s previous message |
Russell Bull said:
Another solution came to mind in that you use another cpu to do the refresh and address mapping A 2nd CPU is is all very when it just needs to be something like the teeny less-than-a-dollar Philips LPCs that Erik loves; but for this you'd need something with a full standard bus interface plus a bunch of IOs to do the refresh, banking, etc - not to mention the IPC (Inter-Processor Comms). So the 2nd CPU isn't going to be a cheapie. Some of the ARM-based MCUs around these days have on-chip SDRAM controllers and are pretty cheap - but then Craig said he didn't want to get into the "other processor" discussion... PS I quite like the Philips LPCs, too! |
| Topic | Author | Date |
| Large RAM bank | 01/01/70 00:00 | |
| Serial? | 01/01/70 00:00 | |
| Speed | 01/01/70 00:00 | |
| Keil...? | 01/01/70 00:00 | |
| Zylogic ZE5? (nee Triscend E5) | 01/01/70 00:00 | |
| Two choices | 01/01/70 00:00 | |
| Use This Idea | 01/01/70 00:00 | |
| Another CPU? | 01/01/70 00:00 | |
| Try This Idea Too | 01/01/70 00:00 | |
| SDRAM maybe viable | 01/01/70 00:00 | |
| What about pseudo static ram? | 01/01/70 00:00 | |
| pseudosrams are not larger | 01/01/70 00:00 | |
| Jez ? | 01/01/70 00:00 | |
| Didn't search first?! | 01/01/70 00:00 | |
| Just a BIG memory? | 01/01/70 00:00 | |
| More information | 01/01/70 00:00 | |
| 512k ONLY? :-) | 01/01/70 00:00 | |
| attach to large SRAM | 01/01/70 00:00 | |
DS80C400? | 01/01/70 00:00 | |
| I did | 01/01/70 00:00 | |
| SDRAM controller | 01/01/70 00:00 | |
| keep it simple&stupid | 01/01/70 00:00 | |
| suggestions and questions | 01/01/70 00:00 | |
| Thanks for input | 01/01/70 00:00 | |
| 2M=4x512k | 01/01/70 00:00 | |
| Good idea | 01/01/70 00:00 | |
| PCB Space - Above & Below | 01/01/70 00:00 | |
| Have you tried ISSI | 01/01/70 00:00 | |
| CF card | 01/01/70 00:00 | |
| Using SD | 01/01/70 00:00 | |
| CPLD | 01/01/70 00:00 |