UICR — User information configuration registers

The user information configuration registers (UICRs) are non-volatile memory (NVM) registers for configuring user-specific settings.

For information on writing UICR registers, see the NVMC — Non-volatile memory controller and Memory chapters.

Registers

Table 1. Instances
Base address	Peripheral	Instance	Description	Configuration
0x10001000	UICR	UICR	User information configuration

Table 2. Register overview
Register	Offset	Description
UNUSED0	0x000		Reserved
UNUSED1	0x004		Reserved
UNUSED2	0x008		Reserved
UNUSED3	0x010		Reserved
NRFFW[0]	0x014	Reserved for Nordic firmware design
NRFFW[1]	0x018	Reserved for Nordic firmware design
NRFFW[2]	0x01C	Reserved for Nordic firmware design
NRFFW[3]	0x020	Reserved for Nordic firmware design
NRFFW[4]	0x024	Reserved for Nordic firmware design
NRFFW[5]	0x028	Reserved for Nordic firmware design
NRFFW[6]	0x02C	Reserved for Nordic firmware design
NRFFW[7]	0x030	Reserved for Nordic firmware design
NRFFW[8]	0x034	Reserved for Nordic firmware design
NRFFW[9]	0x038	Reserved for Nordic firmware design
NRFFW[10]	0x03C	Reserved for Nordic firmware design
NRFFW[11]	0x040	Reserved for Nordic firmware design
NRFFW[12]	0x044	Reserved for Nordic firmware design
NRFHW[0]	0x050	Reserved for Nordic hardware design
NRFHW[1]	0x054	Reserved for Nordic hardware design
NRFHW[2]	0x058	Reserved for Nordic hardware design
NRFHW[3]	0x05C	Reserved for Nordic hardware design
NRFHW[4]	0x060	Reserved for Nordic hardware design
NRFHW[5]	0x064	Reserved for Nordic hardware design
NRFHW[6]	0x068	Reserved for Nordic hardware design
NRFHW[7]	0x06C	Reserved for Nordic hardware design
NRFHW[8]	0x070	Reserved for Nordic hardware design
NRFHW[9]	0x074	Reserved for Nordic hardware design
NRFHW[10]	0x078	Reserved for Nordic hardware design
NRFHW[11]	0x07C	Reserved for Nordic hardware design
CUSTOMER[0]	0x080	Reserved for customer
CUSTOMER[1]	0x084	Reserved for customer
CUSTOMER[2]	0x088	Reserved for customer
CUSTOMER[3]	0x08C	Reserved for customer
CUSTOMER[4]	0x090	Reserved for customer
CUSTOMER[5]	0x094	Reserved for customer
CUSTOMER[6]	0x098	Reserved for customer
CUSTOMER[7]	0x09C	Reserved for customer
CUSTOMER[8]	0x0A0	Reserved for customer
CUSTOMER[9]	0x0A4	Reserved for customer
CUSTOMER[10]	0x0A8	Reserved for customer
CUSTOMER[11]	0x0AC	Reserved for customer
CUSTOMER[12]	0x0B0	Reserved for customer
CUSTOMER[13]	0x0B4	Reserved for customer
CUSTOMER[14]	0x0B8	Reserved for customer
CUSTOMER[15]	0x0BC	Reserved for customer
CUSTOMER[16]	0x0C0	Reserved for customer
CUSTOMER[17]	0x0C4	Reserved for customer
CUSTOMER[18]	0x0C8	Reserved for customer
CUSTOMER[19]	0x0CC	Reserved for customer
CUSTOMER[20]	0x0D0	Reserved for customer
CUSTOMER[21]	0x0D4	Reserved for customer
CUSTOMER[22]	0x0D8	Reserved for customer
CUSTOMER[23]	0x0DC	Reserved for customer
CUSTOMER[24]	0x0E0	Reserved for customer
CUSTOMER[25]	0x0E4	Reserved for customer
CUSTOMER[26]	0x0E8	Reserved for customer
CUSTOMER[27]	0x0EC	Reserved for customer
CUSTOMER[28]	0x0F0	Reserved for customer
CUSTOMER[29]	0x0F4	Reserved for customer
CUSTOMER[30]	0x0F8	Reserved for customer
CUSTOMER[31]	0x0FC	Reserved for customer
NRFMDK[0]	0x100	Reserved for Nordic MDK
NRFMDK[1]	0x104	Reserved for Nordic MDK
NRFMDK[2]	0x108	Reserved for Nordic MDK
NRFMDK[3]	0x10C	Reserved for Nordic MDK
NRFMDK[4]	0x110	Reserved for Nordic MDK
NRFMDK[5]	0x114	Reserved for Nordic MDK
NRFMDK[6]	0x118	Reserved for Nordic MDK
NRFMDK[7]	0x11C	Reserved for Nordic MDK
PSELRESET[0]	0x200	Mapping of the nRESET function (see POWER chapter for details)
PSELRESET[1]	0x204	Mapping of the nRESET function (see POWER chapter for details)
APPROTECT	0x208	Access port protection

NRFFW[n] (n=0..12)

Address offset: 0x014 + (n × 0x4)

Reserved for Nordic firmware design

Bit number				31	30	29	28	27	26	25	24	23	22	21	20	19	18	17	16	15	14	13	12	11	10	9	8	7	6	5	4	3	2	1	0
ID				A	A	A	A	A	A	A	A	A	A	A	A	A	A	A	A	A	A	A	A	A	A	A	A	A	A	A	A	A	A	A	A
Reset 0xFFFFFFFF				1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1
ID	Access	Field	Value ID	Value								Description
A	RW	NRFFW										Reserved for Nordic firmware design

NRFHW[n] (n=0..11)

Address offset: 0x050 + (n × 0x4)

Reserved for Nordic hardware design

Bit number				31	30	29	28	27	26	25	24	23	22	21	20	19	18	17	16	15	14	13	12	11	10	9	8	7	6	5	4	3	2	1	0
ID				A	A	A	A	A	A	A	A	A	A	A	A	A	A	A	A	A	A	A	A	A	A	A	A	A	A	A	A	A	A	A	A
Reset 0xFFFFFFFF				1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1
ID	Access	Field	Value ID	Value								Description
A	RW	NRFHW										Reserved for Nordic hardware design

CUSTOMER[n] (n=0..31)

Address offset: 0x080 + (n × 0x4)

Reserved for customer

Bit number				31	30	29	28	27	26	25	24	23	22	21	20	19	18	17	16	15	14	13	12	11	10	9	8	7	6	5	4	3	2	1	0
ID				A	A	A	A	A	A	A	A	A	A	A	A	A	A	A	A	A	A	A	A	A	A	A	A	A	A	A	A	A	A	A	A
Reset 0xFFFFFFFF				1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1
ID	Access	Field	Value ID	Value								Description
A	RW	CUSTOMER										Reserved for customer

NRFMDK[n] (n=0..7)

Address offset: 0x100 + (n × 0x4)

Reserved for Nordic MDK

Bit number				31	30	29	28	27	26	25	24	23	22	21	20	19	18	17	16	15	14	13	12	11	10	9	8	7	6	5	4	3	2	1	0
ID				A	A	A	A	A	A	A	A	A	A	A	A	A	A	A	A	A	A	A	A	A	A	A	A	A	A	A	A	A	A	A	A
Reset 0xFFFFFFFF				1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1
ID	Access	Field	Value ID	Value								Description
A	RW	NRFMDK										Reserved for Nordic MDK

PSELRESET[n] (n=0..1)

Address offset: 0x200 + (n × 0x4)

Mapping of the nRESET function (see POWER chapter for details)

All PSELRESET registers have to contain the same value for a pin mapping to be valid. If values are not the same, there will be no nRESET function exposed on a GPIO. As a result, the device will always start independently of the levels present on any of the GPIOs.

Bit number				31	30	29	28	27	26	25	24	23	22	21	20	19	18	17	16	15	14	13	12	11	10	9	8	7	6	5	4	3	2	1	0
ID				C																											A	A	A	A	A
Reset 0xFFFFFFFF				1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1
ID	Access	Field	Value ID	Value								Description
A	RW	PIN		21								GPIO pin number onto which nRESET is exposed
C	RW	CONNECT										Connection
			Disconnected	1								Disconnect
			Connected	0								Connect

APPROTECT

Address offset: 0x208

Access port protection

Bit number				31	30	29	28	27	26	25	24	23	22	21	20	19	18	17	16	15	14	13	12	11	10	9	8	7	6	5	4	3	2	1	0
ID																												A	A	A	A	A	A	A	A
Reset 0xFFFFFFFF				1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1
ID	Access	Field	Value ID	Value								Description
A	RW	PALL										Enable or disable access port protection. See Debug for more information.
			Disabled	0xFF								Hardware disable of access port protection for devices where access port protection is controlled by hardware
			HwDisabled	0x5A								Hardware disable of access port protection for devices where access port protection is controlled by hardware and software
			Enabled	0x00								Enable