User Identification. Reading this register or the ICEPICK_DEVICE_ID register is the only support way of identifying a device. The value of this register will be written to AON_WUC:JTAGUSERCODE by boot FW while in safezone.
| PROTOCOL | PROTOCOL |
| PKG | PKG |
| SEQUENCE | SEQUENCE |
| VER | VER |
| PG_REV | PG_REV |