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L3GD20 DRDY signal issues

Question asked by lang.richard on Oct 21, 2013
Latest reply on Oct 22, 2013 by Thiago.Reis@ST
Hello.  I want to process each set of readings from the L3GD20 as they become available.  The DRDY signal seems the most appropriate way to do this.  I've verified with an STMicro engineer that my register settings are correct (simply use the DRDY signal in its normal mode), but I can't see the DRDY signal transitioning from high to low.  It stays high all the time.  I'm using an HP mixed signal 'scope and I'm watching all the other signals (SPI/chip selects, etc) with no problem.  I can get DRDY to transition to low when I turn the FIFO on and configure the DRDY signal to indicate when the FIFO fills beyond the watermark (which I set to 1), but DRDY is supposed to work without the FIFO.

Has anybody seen this behavior?