Shop OBEX P1 Docs P2 Docs Learn Events
Oscillator Freq — Parallax Forums

Oscillator Freq

bloody-orcbloody-orc Posts: 8
edited 2006-03-12 10:33 in General Discussion
Hello
Do i need to change the software to make my SX work with 80MHz Oscillator. in original circuit it is supposed to work on 75MHz but there is no place i could get a hold of one sadly. any ideas?

PS i dont have a programmer to change the software.
Regards
Rain

Comments

  • BeanBean Posts: 8,129
    edited 2006-03-11 13:21
    Parallax sells a 75MHz oscillator. http://www.parallax.com/detail.asp?product_id=252-00005
    You shouldn't have to do anything except change the FREQ value.

    Bean.

    ▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
    "SX-Video·Module" Now available from Parallax for only $28.95

    http://www.parallax.com/detail.asp?product_id=30012

    "SX-Video OSD module" Now available from Parallax for only·$49.95
    http://www.parallax.com/detail.asp?product_id=30015

    Product web site: www.sxvm.com

    "Wise men know when they're right. The wisest also·know when they're wrong."
    ·
  • bloody-orcbloody-orc Posts: 8
    edited 2006-03-11 13:37
    Thanks for you reply
    parralaax may be selling this but they charge 110$ for shiping it here.
    Regards
    Rain
  • BeanBean Posts: 8,129
    edited 2006-03-11 16:06
    bloody-orc said...
    Thanks for you reply
    parralaax may be selling this but they charge 110$ for shiping it here.
    Regards
    Rain
    $110 !!!! Where is "here" ?
    Bean.


    ▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
    "SX-Video·Module" Now available from Parallax for only $28.95

    http://www.parallax.com/detail.asp?product_id=30012

    "SX-Video OSD module" Now available from Parallax for only·$49.95
    http://www.parallax.com/detail.asp?product_id=30015

    Product web site: www.sxvm.com

    "Wise men know when they're right. The wisest also·know when they're wrong."
    ·
  • Jon WilliamsJon Williams Posts: 6,491
    edited 2006-03-11 16:19
    Parallax doesn't charge for shipping -- we simply pass on the costs charged by the companies that actually transport product, and sometimes they charge a whole lot of money for reasons that are very difficult to comprehend....

    ▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
    Jon Williams
    Applications Engineer, Parallax
  • LoopyBytelooseLoopyByteloose Posts: 12,537
    edited 2006-03-11 16:42
    It gets that high to ship to Taiwan, very easily. $300USD of merchandise, $100USD shipping. And 5% duty upon arrival.

    But to answer your question about programing...

    If you have time sensitive code [noparse][[/noparse]such as an RS-232 virtual peripheral, it certainly does matter].· We would need to know what you are trying to do in order to tell you how to fix it.

    ▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
    "When all think alike, no one is thinking very much.' - Walter Lippmann (1889-1974)

    ······································································ Warm regards,····· G. Herzog [noparse][[/noparse]·黃鶴 ]·in Taiwan

    Post Edited (Kramer) : 3/11/2006 4:45:34 PM GMT
  • bloody-orcbloody-orc Posts: 8
    edited 2006-03-11 20:12
    well i have a sx28 programmed by Javalin that i just recieved today. in it is a program that is sadly talking to a camera and RX232 and SErvo so it seems we cant use 80MHz one.

    But! is there a way to create one myself? like multiply a 15MHz one or so?

    btw. "here" is Estonia- country in easten Europe.

    Thans for your replys
  • LoopyBytelooseLoopyByteloose Posts: 12,537
    edited 2006-03-12 10:33
    Well, the SX-28 has internal FUSE settings which include an assumption about the oscillator that will drive it.
    You would have to review the SX-28 PDF to determine if you really can use an alternative.

    The code cannot be changed without a programmer, so you are stuck at 75Mhz.

    Can you actually use the Parallax 75Mhz TTL Oscillator?
    If you certain you can, send me a PM as I have 4 that I just got from Parallax.

    Other people here were very generous in sending me some resonators and I ordered these 75Mhz for a 'rainy day' as I have several SX-48 protoboards. I may never use all of them.

    Still, it will cost you postage plus the $2.50USD from Taiwan. Estonia is a very interesting country. From what I hear, the youth are running the government.

    I only ask that you repay the kindness, by helping someone else on the Forum at sometime in the future. Take a look at the Propeller -- very leading edge.

    ▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
    "When all think alike, no one is thinking very much.' - Walter Lippmann (1889-1974)

    ······································································ Warm regards,····· G. Herzog [noparse][[/noparse]·黃鶴 ]·in Taiwan
Sign In or Register to comment.