Shorter UID

[dmitriylisov]

Greetings,

We're working on iMX53 based board, running Windows CE. We have a requirement for UID (Unique ID), to identify each board.

There's a code in place already to read UID as in here: Easy Way to Read UID(Unique ID) on i.MX53

The problem is that we also have a requirement for this UID to be easily read by human. Clearly, 64 bit number is not that easy to communicate over the phone.

iMX53 manual says that "

42.2.1.2 Fuse Bank 0

Fuse Bank 0 contains manufacturing information such as Unique ID (UID), consists of fab ID, lot and wafer number, and die coordinates.

"

We thought of splitting ID, or skipping certain bytes. But for that we need to know the structure of UNIQUE_ID.

What are offsets of " fab ID, lot and wafer number, and die coordinates", respectively, inside 64-bit UNIQUE_ID value?

Thanks in advance

Dmitriy Lisovenko

[Yuri · Accepted solution]

0820	DIE-X-CORDINATE[7:0] / UNIQUE_ID[63:56] )
0824	DIE-Y-CORDINATE[7:0] / UNIQUE_ID[55:48] )
0828	WAFER_NO[4:0] / UNIQUE_ID[47:43] )	|  LOT_NO_ENC[42:40]
082C	LOT_NO_ENC[39:32] / UNIQUE_ID[39:32] )
0830	LOT_NO_ENC[31:24] / UNIQUE_ID[31:24] )
0834	LOT_NO_ENC[23:16] / UNIQUE_ID[23:16] )
0838	LOT_NO_ENC[15:8] / UNIQUE_ID[15:8] )
083C	LOT_NO_ENC[7:0] / UNIQUE_ID[7:0] )

Also please use Table 7-2 (Boot eFUSE Descriptions) of the i.MX53 RM.