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Programming SMT SX — Parallax Forums

Programming SMT SX

SterlingSterling Posts: 51
edited 2006-05-02 16:13 in General Discussion
How do companies program the SMT SX chips that go on PCBs? Do they program them before or after they are on the PCB?

Comments

  • BeanBean Posts: 8,129
    edited 2006-05-01 02:21
    I always program them AFTER they are put on the PCB. Much easier, but you need to make connections on the PCB. But why handle the chip twice ?
    Bean.

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  • SterlingSterling Posts: 51
    edited 2006-05-01 15:38
    I've seen PCBs that have some filled holes in them. Is this where they program the chips? Is there a way to attach headers pins to this temporarily without soldering?
  • Paul BakerPaul Baker Posts: 6,351
    edited 2006-05-01 16:07
    If you use the proper drill size, you can stick a 4 square post header in so the corners slightly wedge themselves in making a sure contact but allow later removal of the header. As an alternative, you can use wedge probes which are inserted between the pins of the chip.

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  • TDDoddsTDDodds Posts: 4
    edited 2006-05-01 22:07
    For SX programmingI just put four header holes on·each board near the chip.·Then, when I'm ready to program,·I put one end of a four-pin header into the key and plug the other end of the header into the·four board·holes at enough of an angle so it makes a good temporary contact and download the code.
  • SterlingSterling Posts: 51
    edited 2006-05-02 16:13
    That's a great idea!
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