| ??? 03/04/05 16:03 Read: times |
#89121 - Why not Responding to: ???'s previous message |
Jan Waclawek said:
PS. Back to topic: what about storing the bitmaps in big serial memories? I2C or SPI, or some sort of memory card - Atmel DataFlash or MMC? Like Erik said, probably too slow. Why not put the bitmaps in an EPROM (or 2 or 3) and just select which one is active at 8000h-FFFFh with some port-driven select lines? Or with a serial-parallel IC? If the bitmaps are subject to change then use a memory card for the dynamic storage, but load them at startup into banked XRAM wired the same as above. That way the bitmaps can be changed easily but you don't actually have to load them from the card each time you need them. Regards, Craig Steiner |
| Topic | Author | Date |
| basic question on 8051 eprom access | 01/01/70 00:00 | |
| Read the manual... | 01/01/70 00:00 | |
| bible time | 01/01/70 00:00 | |
| bible time | 01/01/70 00:00 | |
| more memory | 01/01/70 00:00 | |
| reply | 01/01/70 00:00 | |
| in that case | 01/01/70 00:00 | |
| cutting down chip count | 01/01/70 00:00 | |
| not "just" when a beginner | 01/01/70 00:00 | |
| page switching etc. | 01/01/70 00:00 | |
| that was not it | 01/01/70 00:00 | |
| Please, explain | 01/01/70 00:00 | |
| serial and display | 01/01/70 00:00 | |
| I2C is up to 1MHz... | 01/01/70 00:00 | |
| MMC real tests | 01/01/70 00:00 | |
| Why not | 01/01/70 00:00 | |
| ... | 01/01/70 00:00 | |
| I suspect | 01/01/70 00:00 | |
| el chepo | 01/01/70 00:00 | |
| even cheaper | 01/01/70 00:00 | |
| a word on Flash | 01/01/70 00:00 | |
| flash | 01/01/70 00:00 | |
| here you go | 01/01/70 00:00 | |
Thanks Erik | 01/01/70 00:00 |