Read: 272 times
|#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.
|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|