76. Device electronic signature
The device electronic signature is stored in the system memory area of the flash memory module and can be read using the debug interface or by the CPU. It contains factory-programmed identification and calibration data that allow the user firmware or other external devices to automatically match to the characteristics of the devices.
76.1 Unique device ID register (96 bits)
The unique device identifier is ideally suited:
- • for use as serial numbers (for example USB string serial numbers or other end applications)
- • for use as part of the security keys in order to increase the security of code in flash memory while using and combining this unique ID with software cryptographic primitives and protocols before programming the internal flash memory
- • to activate secure boot processes
The 96-bit unique device identifier provides a reference number which is unique for any device and in any context. These bits cannot be altered by the user.
Base address: 0x0BFA 0700
Address offset: 0x00
Read only = 0xXXXX XXXX where X is factory-programmed
| 31 | 30 | 29 | 28 | 27 | 26 | 25 | 24 | 23 | 22 | 21 | 20 | 19 | 18 | 17 | 16 |
| UID[31:16] | |||||||||||||||
| r | r | r | r | r | r | r | r | r | r | r | r | r | r | r | r |
| 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
| UID[15:0] | |||||||||||||||
| r | r | r | r | r | r | r | r | r | r | r | r | r | r | r | r |
Bits 31:0 UID[31:0] : X and Y coordinates on the wafer
Address offset: 0x04
Read only = 0xXXXX XXXX where X is factory-programmed
| 31 | 30 | 29 | 28 | 27 | 26 | 25 | 24 | 23 | 22 | 21 | 20 | 19 | 18 | 17 | 16 |
| UID[63:48] | |||||||||||||||
| r | r | r | r | r | r | r | r | r | r | r | r | r | r | r | r |
| 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
| UID[47:32] | |||||||||||||||
| r | r | r | r | r | r | r | r | r | r | r | r | r | r | r | r |
Bits 31:8 UID[63:40] : LOT_NUM[23:0]
Lot number (ASCII encoded)
Bits 7:0 UID[39:32] : WAF_NUM[7:0]
Wafer number (8-bit unsigned number)
Address offset: 0x08
Read only = 0xXXXX XXXX where X is factory-programmed
| 31 | 30 | 29 | 28 | 27 | 26 | 25 | 24 | 23 | 22 | 21 | 20 | 19 | 18 | 17 | 16 |
| UID[95:80] | |||||||||||||||
| r | r | r | r | r | r | r | r | r | r | r | r | r | r | r | r |
| 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
| UID[79:64] | |||||||||||||||
| r | r | r | r | r | r | r | r | r | r | r | r | r | r | r | r |
Bits 31:0 UID[95:64] : LOT_NUM[55:24]
Lot number (ASCII encoded)
76.2 Flash size data register
Base address: 0x0BFA 07A0
Address offset: 0x00
Read only = 0xXXXX where X is factory-programmed
| 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
| FLASH_SIZE | |||||||||||||||
| r | r | r | r | r | r | r | r | r | r | r | r | r | r | r | r |
Bits 15:0 FLASH_SIZE[15:0] : Flash memory size
This field indicates the size of the device flash memory expressed in Kbytes.
As an example, 0x800 corresponds to 2048 Kbytes.
76.3 Package data register
Base address: 0x0BFA 0500
Address offset: 0x00
Read only = 0xXXXX where X is factory-programmed
| 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Res. | Res. | Res. | Res. | Res. | Res. | Res. | Res. | Res. | Res. | Res. | PKG[4:0] | ||||
| r | r | r | r | r | |||||||||||
Bits 15:5 Reserved, must be kept at reset value.
Bits 4:0 PKG[4:0] : Package type
- 00000: LQFP64
- 00001: WLCSP72 SMPS
- 00010: LQFP100
- 00011: UFBGA132
- 00100: LQFP144
- 00101: LQFP48
- 00111: UFBGA169 or TFBGA169
- 01000: LQFP64 SMPS
- 01001: WLCSP90 SMPS
- 01010: LQFP100 SMPS
- 01011: UFBGA132 SMPS
- 01100: LQFP144 SMPS
- 01101: LQFP48 SMPS
- 01111: UFBGA169 SMPS or TFBGA169 SMPS
- 10010: UFBGA64
- 10011: UFBGA100
- 10100: LQFP100 DSI SMPS
- 10101: LQFP144 DSI SMPS
- 11001: UFBGA144 DSI SMPS
- 11011: WLCSP208 DSI SMPS
- 11100: TFBGA216 DSI SMPS
- 11101: UFBGA100 SMPS
- 11110: WLCSP56 SMPS
- 11111: WLCSP150 SMPS or WLCSP150 DSI SMPS
Note: Refer to product datasheet for availability of packages on a specific device.