topic Re: I.MX8M Revision Register? in i.MX Processors

I.MX8M Revision Register?

mike_james — Wed, 25 Mar 2020 19:12:56 GMT

Is there a register on the I.MX8M that distinguishes between Silicon Rev. A and B (rev 1.0 and rev 1.1)? EB00870 (i.mx 8m Mask Set 1N14W to 2N14W Migration Guide) refers to a "Silicon version register address" at 0x30350040, but there doesn't seem to be a reference to it in the Reference Manual.

Re: I.MX8M Revision Register?

AldoG — Mon, 30 Mar 2020 20:28:27 GMT

Hello,

The mscale B1 uses OCOTP_HW_OCOTP_READ_FUSE_DATA register for chip id, it returns 0xff0055aa.

Also, you may take a look to the part marking of the device you are using i.e.

MIMX8MQxxxxxxxA -----> Rev 1.0

MIMX8MQxxxxxxxB -----> Rev 1.1

This information is available in the product datasheet Figure 2. Part number nomenclature

Hope this helps,

Best regards,

Aldo.

Re: I.MX8M Revision Register?

mike_james — Mon, 30 Mar 2020 21:40:50 GMT

Aldo,

Our I.MX8MQxA boards report back:

CPU: Freescale i.MX8MQLite rev2.0 1300 MHz (running at 800 MHz)

the I.MX8MQxB boards report:

CPU: Freescale i.MX8MQLite rev2.1 1300 MHz (running at 800 MHz)

How do these values correlate with the revs you referred to?

Thanks,

Mike

Re: I.MX8M Revision Register?

AldoG — Fri, 03 Apr 2020 02:01:26 GMT

Hello,

Sorry for the confusion,

Rev 1.0 ---> A0 chips

Rev 2.0 ---> B0 chips

Rev 2.1 ---> B1 chips

Hope this helps,

Best regards,

Aldo.