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EEPROM that I can use in SX — Parallax Forums

EEPROM that I can use in SX

basicstampedebasicstampede Posts: 214
edited 2004-08-25 15:46 in General Discussion
In BS2, I can use leftover EEPROM memory (read and write).

Does anyone know if I can do that with SX?·

I'm using SX Key with SXWIZ compiler.

Thanks.
·

Comments

  • BeanBean Posts: 8,129
    edited 2004-08-03 13:38
    Sorry, no you can't.
    The flash memory cannot be "self-programmed".
    You would have to use an external EEPROM, (just as the BS2 does).

    Bean.
  • basicstampedebasicstampede Posts: 214
    edited 2004-08-05 15:48
    Well, actually, I was able to use the leftover EEPROM space on my BS2, which allowed me to eliminate an external EEPROM chip.

    Since my PCB space is extremely limited, (but wanting to use an SX chip), I was wondering if I can convert my design from BS2 to SX and use the left over EEPROM from SX.

    So are you saying that the user does not have control over contents of EEPROM at run time for SX?
  • Jon WilliamsJon Williams Posts: 6,491
    edited 2004-08-05 18:27
    Remember that the BS2 is a module that has many parts; one of them is an external EEPROM that holds the program and user data. READ and WRITE actually dealing with an external component -- you'll have to mimic this with an SX design. The SX Demo Board has a 24LC01 on it to experiment with.

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    Jon Williams
    Applications Engineer, Parallax
    Dallas Office
  • PaPaulPaPaul Posts: 1
    edited 2004-08-18 17:02
    Hi Jon,
    I just tried to order the SX Demo board and was told they were no longer available. Just wanted to let you and the other members know about this.
    Paul
  • Jon WilliamsJon Williams Posts: 6,491
    edited 2004-08-18 18:09
    That board wasn't selling well, but we still have SX Tech board, which is SXmicro version of our popular BOE.

    http://www.parallax.com/detail.asp?product_id=45205

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    Jon Williams
    Applications Engineer, Parallax
    Dallas Office
  • Stanley FredericksonStanley Frederickson Posts: 19
    edited 2004-08-18 20:00
    On a related topic. I really like the SX Tech board. I have used it for over three years now. However, there have been a few times where I wish it had a dual row app mod header like many of the other Parallax boards. It could just not connect to any of the RA pins and just use the RB and RC pins to get the 16 data pins. Currently I use a little converter that allows me to use app mods like the EB500 on the breadboard portion of the board.
  • spookyspooky Posts: 2
    edited 2004-08-25 15:46
    if you aren't intimidated by an SO8-wide package, I'd recommend the M25P80 by ST Microelectronics.· I won't hide the fact that I didn't discover this little jewel.· It is used on the Parallax dev board for the Altera cyclone as part of their bootloader circuitry.· (...which btw, is one nice little demo board for folks trying to learn FPGAs).· SO...· i would imagine there are people on the forums (Parallax employees perhaps!) that have quite a bit of experience interfacing SX's and this little guy.
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