30.6.2 OTPC Mode Register
This register can only be written if the WPCFEN bit is cleared in the OTPC Write Protection Mode Register.
| Name: | OTPC_MR |
| Offset: | 0x04 |
| Reset: | 0x00000000 |
| Property: | Read/Write |
| Bit | 31 | 30 | 29 | 28 | 27 | 26 | 25 | 24 | |
| ADDR[15:8] | |||||||||
| Access | R/W | R/W | R/W | R/W | R/W | R/W | R/W | R/W | |
| Reset | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |
| Bit | 23 | 22 | 21 | 20 | 19 | 18 | 17 | 16 | |
| ADDR[7:0] | |||||||||
| Access | R/W | R/W | R/W | R/W | R/W | R/W | R/W | R/W | |
| Reset | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |
| Bit | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | |
| LOCK | KBDST[1:0] | WRDIS | RDDIS | ||||||
| Access | R/W | R/W | R/W | R/W | R/W | ||||
| Reset | 0 | 0 | 0 | 0 | 0 | ||||
| Bit | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | |
| EMUL | NPCKT | UHCRRDIS | |||||||
| Access | R/W | R/W | R/W | ||||||
| Reset | 0 | 0 | 0 |
Bits 31:16 – ADDR[15:0] Address
This field represents the address of the packet’s header.
Bit 15 – LOCK Lock Register
| Value | Description |
|---|---|
| 0 | The OTPC_MR register is unlocked; write access changes its value. |
| 1 | The OTPC_MR register is locked; write access does not change its value. |
Bits 13:12 – KBDST[1:0] Key Bus Destination
| Value | Name | Description |
|---|---|---|
| 0 | NONE | No destination selected (no transfer can occur). |
| 1 | AES | The AES is the destination of the key transfer. |
| 2 | TZAESB | The TrustZone AES Bridge is the destination of the key transfer. |
| 3 | TDES | The TDES is the destination of the key transfer. |
Bit 9 – WRDIS Write Disable
| Value | Description |
|---|---|
| 0 | The write capability of the OTPC_DR register is enabled. |
| 1 | The write capability of the OTPC_DR register is disabled. |
Bit 8 – RDDIS Read Disable
| Value | Description |
|---|---|
| 0 | The read capability of the OTPC_HR and OTPC_DR registers are enabled. |
| 1 | The read capability of the OTPC_HR and OTPC_DR registers are disabled. In case of read, the returned value is 0. |
Bit 7 – EMUL Emulation Enable
| Value | Description |
|---|---|
| 0 | The Emulation mode of the User area is disabled, all accesses are computed in the OTP memory. |
| 1 | The Emulation mode of the User area is enabled, all accesses are computed in the Emulation memory. |
Bit 4 – NPCKT New Packet
| Value | Description |
|---|---|
| 0 | Updates the packet defined at the ADDR address. |
| 1 | Creates a new packet. |
Bit 0 – UHCRRDIS User Hardware Configuration Register Read Disable
| Value | Description |
|---|---|
| 0 | The User Hardware Configuration register can be read through the User Interface. |
| 1 | The User Hardware Configuration register cannot be read through the User Interface. |