MCU with no Flash

AtomSoft

Well-Known Member

• Mar 3, 2011

• #1

Hello everyone i was bored and was reading on the NET i found some new/old info.

There are micro controllers that use external flash memory ... I would love to know more about this. Can some people please post some links? Google is a good source if you know what to exactly search for, but i dont so please be cool and not say ..

"oh the first thing on google is..."

Thats too rude

 

blueroomelectronics

Well-Known Member

• Mar 3, 2011

• #2

Quite a few use external Flash. Most SAM9 designs I've seen use external RAM/ROM/Flash.

 

Mike - K8LH

Well-Known Member

• Mar 3, 2011

• #3

Hi Jason,

The first microcontrollers I used maybe ten years ago were Motorola MC68HC11' and MC68HC12' devices which used a von neumann buss architecture (as opposed to a harvard architecture) and the boards I made with them had external RAM and EEPROM ICs.

Cheerful regards, Mike

 

Last edited: Mar 3, 2011

be80be

Well-Known Member

• Mar 3, 2011

• #4

The Z80 has RAM and EEPROM ICs.

 

AtomSoft

Well-Known Member

• Mar 3, 2011

• #5

dont you guys think external flas would be cool to be able to use for code? less safe but nice. i assume u would be able to use as much like a 16mbit flash for code and never have to worry... of course it would be slower but with the speeds of todays mcus it wont matter tomorrow heh

i guess im reinventing the pc idea

 

Mike - K8LH

Well-Known Member

• Mar 3, 2011

• #6

be80be said:

The Z80 has RAM and EEPROM ICs.

Click to expand...

But that's a microcomputer, not a microcontroller...

 

AtomSoft

Well-Known Member

• Mar 3, 2011

• #7

microcomputer.... nice... never read on that. heh i guess i have something to google now. It seems like thats what im talking about tho..

More like a PCs CPU correct?

 

blueroomelectronics

Well-Known Member

• Mar 3, 2011

• #8

Look at the BeagleBoard for ideas. When you need megabytes memory you pretty much have to go externally. Most useful with an OS like Linux.

 

Nigel Goodwin

Super Moderator

Most Helpful Member

• Mar 3, 2011

• #9

AtomSoft said:

dont you guys think external flas would be cool to be able to use for code? less safe but nice. i assume u would be able to use as much like a 16mbit flash for code and never have to worry... of course it would be slower but with the speeds of todays mcus it wont matter tomorrow heh

Click to expand...

I think you're missing the point - microprocessors use external memory, one of the main points of a microcontroller is that everything is internal, a single chip solution.

 

AtomSoft

Well-Known Member

• Mar 3, 2011

• #10

yes but i never had a point i never compared the two i simply stated a mcu with external flash would be nice.

now i changes the aubject since i found out a mpu is what i need info on