| David Prentice 05/24/12 06:20 Read: 272 times Wormshill England |
#187495 - Most projects do not need external memory Responding to: ???'s previous message |
Seriously, you often need some non-volatile RAM or EEPROM for configuration or machine settings. Some 8051s have built-in EEPROM. Others can write to some flash pages.
Most modern chips can sleep and retain SRAM memory from a coin-cell. Yes. You can use up 2 ports on an external memory bus. A suitable 8051 variant can do the whole job in a single chip. And you require zero code changes. Without any quantitative information, you can't look up any parametric tables. And we have no idea whether you want / need 1kB or 1MB of SRAM. David. |
| Topic | Author | Date |
| More Ports or Non-Volatile RAM | Kurt Adam | 05/23/12 17:47 |
| Numbers always help | Jim Granville | 05/23/12 22:17 |
| Trying to read your mind | Michael Karas | 05/23/12 22:48 |
| Write down your project requirements | David Prentice | 05/24/12 04:54 |
| Details | Kurt Adam | 05/24/12 05:48 |
| Most projects do not need external memory | David Prentice | 05/24/12 06:20 |
SILabs have 8-porters  | Erik Malund | 05/24/12 07:30 |
| Don't overlook the additional memory ... | Richard Erlacher | 05/24/12 09:09 |
| Further Details and Thankyou | Kurt Adam | 05/24/12 08:44 |
| AT89S8253 ? | Jim Granville | 05/24/12 16:04 |
| This worked. Thanks | Kurt Adam | 05/30/12 17:54 |
| Hold your horses | Hans Van Pelt | 05/31/12 03:04 |
| F-RAM | Per Westermark | 05/31/12 05:31 |
| Yes! I like 'em, and there's no write delay | Richard Erlacher | 05/31/12 06:38 |
| 3 things | Erik Malund | 05/31/12 07:33 |
| some or all? | Erik Malund | 05/24/12 09:42 |
| Re:some or all | Kurt Adam | 05/24/12 09:50 |
| how much and can you | Erik Malund | 05/24/12 10:07 |
| Options | David Good | 05/24/12 10:08 |
| Had you read the datasheets ... | Richard Erlacher | 05/24/12 09:06 |
| sorry | Kurt Adam | 05/24/12 09:22 |
| I doubt it'll hurt you ... | Richard Erlacher | 05/25/12 08:16 |
| WOW | Erik Malund | 05/25/12 09:48 |
| Yes | Per Westermark | 05/26/12 03:32 |
| Well, it is a troll, as someone has pointed out ... | Richard Erlacher | 05/26/12 07:04 |
| "his" money | Erik Malund | 05/26/12 07:54 |
| You're probably right. It's a shame, but it's so | Richard Erlacher | 05/26/12 19:31 |
| Is that true? | Andy Neil | 06/05/12 05:19 |
I doubt it ... | Richard Erlacher | 06/05/12 09:55 |