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93AA66A EEPROM with BS2sx — Parallax Forums

93AA66A EEPROM with BS2sx

xanatosxanatos Posts: 1,120
edited 2011-05-12 10:23 in BASIC Stamp
Curious if anyone has used the 93AA66A EEPROM with the non-I2C BS2s, such as the BS2sx. I'm assuming they are compatible, yes?

Thanks,

Dave

Comments

  • Mike GreenMike Green Posts: 23,101
    edited 2011-05-11 12:21
    The 93AA66A is an SPI-based EEPROM and should work fine with any of the Stamps including the BS2sx. You'd use HIGH and LOW for the /CS line and SHIFTOUT and SHIFTIN for the CLK and DI or CLK and DO lines respectively. You probably should connect a 1K or 2.2K resistor between the DO line and the corresponding Stamp I/O pin. You could also connect DO through a 1K or 2.2K resistor to the same Stamp I/O pin where you've connected DI. See the 93AA66A datasheet for a description of this.
  • xanatosxanatos Posts: 1,120
    edited 2011-05-12 10:23
    Thanks Mike!

    I'm going to use those with the BS2sx version of my Speaking/voice controlled home automation system, but will be using I2C EEPROMs for the BS2p40 version... I've run out of pins on the 2sx!!! Even with sharing I/o lines!

    Dave
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