topic Re: What is the MMA7456L WHO_AM_I register value? in Sensors https://community.nxp.com/t5/Sensors/What-is-the-MMA7456L-WHO-AM-I-register-value/m-p/409103#M1716 <HTML><HEAD></HEAD><BODY><P>Hi Martin,</P><P></P><P>Let me explain the history of the MMA745xL. Seven years ago, the original MMA7455L was improved resulting in tighter offset specification tolerances and better TCO and TCS performance (see <A href="http://cache.freescale.com/files/shared/doc/pcn/PCN13436.htm">PCN13436</A>). This improved version got a new number - MMA7456L. However, our marketing department decided to cancel this part number and maintain the MMA7455L. All MMA7455L products shipped from Oct 30, 2008 and later are the improved versions.</P><P></P><P>Let me know if you have any other questions.</P><P></P><P>Regards,</P><P>Tomas</P></BODY></HTML> Tue, 20 Oct 2015 08:58:05 GMT TomasVaverka 2015-10-20T08:58:05Z What is the MMA7456L WHO_AM_I register value? https://community.nxp.com/t5/Sensors/What-is-the-MMA7456L-WHO-AM-I-register-value/m-p/409100#M1713 <HTML><HEAD></HEAD><BODY><P>The data sheet doesn't describe this register. Thanks!</P></BODY></HTML> Tue, 03 Feb 2026 22:31:22 GMT https://community.nxp.com/t5/Sensors/What-is-the-MMA7456L-WHO-AM-I-register-value/m-p/409100#M1713 martinkepplinge 2026-02-03T22:31:22Z Re: What is the MMA7456L WHO_AM_I register value? https://community.nxp.com/t5/Sensors/What-is-the-MMA7456L-WHO-AM-I-register-value/m-p/409101#M1714 <HTML><HEAD></HEAD><BODY><P>Hi Martin,</P><P></P><P><SPAN style="font-size: 10.0pt; font-family: 'Arial','sans-serif';">The content of the Who_Am_I register (0x0F) is 0x55.</SPAN></P><P></P><P><SPAN style="font-size: 10.0pt; font-family: 'Arial','sans-serif';">Regards,</SPAN></P><P><SPAN style="font-size: 10.0pt; font-family: 'Arial','sans-serif';">Tomas</SPAN></P><P></P><P><SPAN style="font-size: 10.0pt; font-family: 'Arial','sans-serif';"><EM style="font-size: 11px; font-family: arial, helvetica, 'helvetica neue', verdana, sans-serif; color: #51626f;">PS: If my answer helps to solve your question, please mark it as "Correct". Thank you.</EM> </SPAN></P></BODY></HTML> Mon, 19 Oct 2015 13:55:14 GMT https://community.nxp.com/t5/Sensors/What-is-the-MMA7456L-WHO-AM-I-register-value/m-p/409101#M1714 TomasVaverka 2015-10-19T13:55:14Z Re: What is the MMA7456L WHO_AM_I register value? https://community.nxp.com/t5/Sensors/What-is-the-MMA7456L-WHO-AM-I-register-value/m-p/409102#M1715 <HTML><HEAD></HEAD><BODY><P>So that's the same as for MMA7455L. What's the difference between the two? Thanks a lot!</P></BODY></HTML> Mon, 19 Oct 2015 13:58:46 GMT https://community.nxp.com/t5/Sensors/What-is-the-MMA7456L-WHO-AM-I-register-value/m-p/409102#M1715 martinkepplinge 2015-10-19T13:58:46Z Re: What is the MMA7456L WHO_AM_I register value? https://community.nxp.com/t5/Sensors/What-is-the-MMA7456L-WHO-AM-I-register-value/m-p/409103#M1716 <HTML><HEAD></HEAD><BODY><P>Hi Martin,</P><P></P><P>Let me explain the history of the MMA745xL. Seven years ago, the original MMA7455L was improved resulting in tighter offset specification tolerances and better TCO and TCS performance (see <A href="http://cache.freescale.com/files/shared/doc/pcn/PCN13436.htm">PCN13436</A>). This improved version got a new number - MMA7456L. However, our marketing department decided to cancel this part number and maintain the MMA7455L. All MMA7455L products shipped from Oct 30, 2008 and later are the improved versions.</P><P></P><P>Let me know if you have any other questions.</P><P></P><P>Regards,</P><P>Tomas</P></BODY></HTML> Tue, 20 Oct 2015 08:58:05 GMT https://community.nxp.com/t5/Sensors/What-is-the-MMA7456L-WHO-AM-I-register-value/m-p/409103#M1716 TomasVaverka 2015-10-20T08:58:05Z