Why and when flash memory is needed in embedded system?

Is it possible that embedded system doesn't have flash memory? If we
use flash memory in embedded system, then we don't need to use ROM, or
both? My understanding is that flash memory is similar to ROM, that
stores permanent data like boot up instructions?? Is that correct?
Please advice. thanks...

.

Relevant Pages

  • Re: Why and when flash memory is needed in embedded system?
    ... use flash memory in embedded system, then we don't need to use ROM, or ... My understanding is that flash memory is similar to ROM, ... I think some form of non-volatile memory is needed in a system ...
    (comp.arch.embedded)
  • Re: Why and when flash memory is needed in embedded system?
    ... My understanding is that flash memory is similar to ROM, ... stores permanent data like boot up instructions?? ...
    (comp.arch.embedded)
  • Re: New Debug4x Version with 2.15 ROM
    ... the calculator erase the flash memory and stop here. ... With 2.15 ROM i got a HP49G with no ROM ... unlocking the door at the 15th floor, ...
    (comp.sys.hp48)
  • Re: Microcontrollers FLASH vs ROM
    ... Time ago I have had a question about microcontrollers with flash memory ... which are the advantage of ROM ... Usefull for development and ...
    (sci.electronics.components)
  • Re: Boot ROM corruption
    ... We are facing a peculiar problem with the boot rom getting corrupted on ... ROM memory is often flash memory these days. ... correct order corrupt it. ...
    (comp.os.vxworks)