Hi, is there a way to save the i2c free programmable slave address of MMA995xL sensor module ?
Yes, this should be doable. Nevertheless we need more information from you, more specifically which version are you considering (between MMA9550, MMA9551, MMA9553, MMA9555, MMA9559...), as their Firmware differ and may be a limiting factor.
One possibility is to do this "programmatically": i.e. add a custom application that changes the Slave Port Address during MMA9550L initialization (see SP_ADDR register in MMA955xL Hardware Reference manual p.108). You can find information about developing custom user application in AN4129.
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