A couple basic questions regarding a ADC

Hi - I'm working on interfacing a TI ADS1252 ADC (http://www-
s.ti.com/sc/ds/ads1252.pdf) to an Atmel AVR (an 8b microcontroller, an
ATMEGA48). This one was marked as having SPI, which I thought would make it
easy to interface with. Now that I'm sitting down and wiring it up, I have
noticed something very strange. There are only *two* digital io lines,
while SPI typically has three. Can anybody tell me if the built in SPI
device in an AVR will be able to handle this?

Also - it asks for a clock input, but it only has one pin for the clock.
I'm used to just attaching a crystal and two capacitors for a clock signal,
but that doesn't exactly seem possible with only one clock pin. So - how
would I go about getting a 16Mhz clock signal?

Thanks for your help,

-Michael J. Noone
.

Relevant Pages

  • Re: Mixed clocked/combinatorial coding styles (another thread)
    ... I don't consider my SPI code as finished but I've seen what ... of the SPI clock at the master where it *should* be for a normal SPI system. ... But does this choice force me to, for example, clock the CPU ... this clock frequency does not need to be used when communicating ...
    (comp.lang.vhdl)
  • Re: Mixed clocked/combinatorial coding styles (another thread)
    ... I don't consider my SPI code as finished but I've seen what ... of the SPI clock at the master where it *should* be for a normal SPI system. ... But does this choice force me to, for example, clock the CPU ... If that's not your case, then you've got a wimpy CPU, but in that situation you wouldn't have a clock divider, and the data handling would be done differently. ...
    (comp.lang.vhdl)
  • Re: SPI unterminated
    ... the plan is to run the SPI signal ... I would put a series resistor at the clock driver (there is ... You may want to put ground pins adjacent to the clock pin to ... But if you would rather be safe than sorry, or if the signals are going ...
    (sci.electronics.design)
  • Re: Augh! WTF megabaud?
    ... >worried about clock rate, bitbanging. ... dedicated SPI interface in the 68332 to program a couple of Xilinx ... chips (essentially SPI in slave serial mode) or whether to just keep ... We're planning a product with maybe 10 mbits of Xilinx configuration ...
    (sci.electronics.basics)
  • SPI on the User Port ... Mode Hang-Ups.
    ... SCLK: the serial clock ... SPI devices are byte-wide, but some are 16-bits wide, and some Digital/ ... the interface is often little more than a serial shift ... counter to trigger a write of data to the shift register and/or read ...
    (comp.sys.cbm)