22.9.10 User Unique ID

The User ID is a 16-bit ID that can be programmed to differentiate products that use the same device. The User ID value may be read directly out of the USER_ID register or through the SWD interface.

There is no dedicated status bit to indicate when the User ID value is loaded into the USER_ID register and is ready to be read from SWD. It is assumed that a non-zero value for the User ID is used to indicate that the User ID is loaded.

The USER_ID register is reset on power-up, then is loaded with trusted data from FBCFG5 during the pre-boot period, and it is controlled.

Trusted data from Flash means that when there is no BCFG* fail status during Flash, configuration word reads. If accompanied by fail status BCFGFAIL (RCON[26]) or blank/erase indication, Reset values (described in the following register description) are retained and new values from FBCFG5/FUSERID are not loaded.

Name:	USER_ID
Offset:	0xA0
Reset:	0x00000000
Property:	-


Bit	31	30	29	28	27	26	25	24

Access
Reset


Bit	23	22	21	20	19	18	17	16

Access
Reset


Bit	15	14	13	12	11	10	9	8
	USER_ID[15:8]
Access	R/W/L	R/W/L	R/W/L	R/W/L	R/W/L	R/W/L	R/W/L	R/W/L
Reset	0	0	0	0	0	0	0	0


Bit	7	6	5	4	3	2	1	0
	USER_ID[7:0]
Access	R/W/L	R/W/L	R/W/L	R/W/L	R/W/L	R/W/L	R/W/L	R/W/L
Reset	0	0	0	0	0	0	0	0

Bits 15:0 – USER_ID[15:0] User unique ID

Note: This field is only writable when CFGLOCK[1:0] is ‘00’.