This document is organized into chapters that are based on the modules and peripherals available in the IC.

Document status

The document status reflects the level of maturity of the document.

Table 1. Defined document names
Document name Description
Objective Product Specification (OPS)

Applies to document versions up to 1.0.

This document contains target specifications for product development.
Product Specification (PS)

Applies to document versions 1.0 and higher.

This document contains final product specifications. Nordic Semiconductor ASA reserves the right to make changes at any time without notice in order to improve design and supply the best possible product.

Peripheral chapters

The chapters describing peripherals include the following information:

  • A detailed functional description of the peripheral.
  • The register configuration for the peripheral.
  • The electrical specification tables, containing performance data which apply for the operating conditions described in Recommended operating conditions.

Peripheral instantiation

The peripherals have a set of security capabilities listed in Peripherals.

The following table describes the abbreviations used.
Table 2. Instantiation table abbreviations
Abbreviation Description
NS Trustzone/security attribute is Non-secure - The peripheral is accessible as a Non-secure peripheral.
S Trustzone/security attribute is Secure - The peripheral is accessible as a Secure peripheral.
US Trustzone Map is user selectable - The Trustzone/security attribute of the peripheral is configurable.
HF Trustzone Map is Hardware Fixed - The Trustzone/security attribute of the peripheral cannot be changed.
NA Not Applicable - Peripheral has no DMA capability.
NSA NoSeparateAttribute - Peripheral with DMA and DMA transfer has the same security attribute as assigned to the peripheral.
SA SeparateAttribute - Peripheral with DMA and DMA transfers can have a different security attribute than the one assigned to the peripheral.
The Secure mapping column in the peripheral instantiation table defines configuration capabilities for the Arm® TrustZone® for Armv8-M secure attribute. The DMA security column describes the DMA capabilities of the peripheral.
The instantiation table has the following columns:
  • Instance Column - Indicates the peripheral instance name followed by optional Trustzone attribute. A corresponding address is listed in Base address column indicating the base address for Secure and Non-secure Trustzone attribute. This optional Trustzone attribute is separated by a colon (:).
  • Trustzone Column - This has 3 sub-columns indicating the Trustzone map, Trustzone attribute and DMA capability. The options are as listed in Instantiation table abbreviations .

Register overview table

The register overview table shows a summary of all peripheral registers.

The following table explains the columns of the register overview table.

Table 3. Register overview table
Field Description
Register Name of register
Offset Offset address from peripheral base address
TZ Security setting for split-security peripherals, and blank for other peripherals
Description Short summary of intended use

Register tables

Individual registers are described using register tables. These tables are built up of two sections. The first three colored rows describe the position and size of the different fields in the register. The following rows describe the fields in more detail.

Fields and values

The Id (Field Id) row specifies the bits that belong to the different fields in the register. If a field has enumerated values, then every value will be identified with a unique value id in the Value ID column.

A blank space means that the field is reserved and read as undefined, and it also must be written as 0 to secure forward compatibility. If a register is divided into more than one field, a unique field name is specified for each field in the Field column. The Value ID may be omitted in the single-bit bit fields when values can be substituted with a Boolean type enumerator range, e.g. true/false, disable(d)/enable(d), on/off, and so on.

Values are usually provided as decimal or hexadecimal. Hexadecimal values have a 0x prefix, decimal values have no prefix.

The Value column can be populated in the following ways:

  • Individual enumerated values, for example 1, 3, 9.
  • Range of values, e.g. [0..4], indicating all values from and including 0 and 4.
  • Implicit values. If no values are indicated in the Value column, all bit combinations are supported, or alternatively the field's translation and limitations are described in the text instead.

If two or more fields are closely related, the Value ID, Value, and Description may be omitted for all but the first field. Subsequent fields will indicate inheritance with '..'.

A feature marked Deprecated should not be used for new designs.

Permissions

Different fields in a register might have different access permissions enforced by hardware.

The access permission for each register field is documented in the Access column in the following ways:

Table 4. Register field permission schemes
Access Description Hardware behavior
R Read-only Field can only be read. A write will be ignored.
W Write-only Field can only be written. A read will return an undefined value.
RW Read-write Field can be read and written multiple times.
W1 Write-once Field can only be written once per reset. Any subsequent write will be ignored. A read will return an undefined value.
RW1 Read-write-once Field can be read multiple times, but only written once per reset. Any subsequent write will be ignored.
W0C Write 0 to clear Field can be read multiple times. A zero clears (set to zero) the corresponding bit in the register. Bits set to one are ignored.
W1C Write 1 to clear Field can be read multiple times. A one clears (set to zero) the corresponding bit in the register. Bits set to zero are ignored.
W1S Write 1 to set Field can be read multiple times. A one sets the corresponding bit in the register. Bits set to zero are ignored.
RME Read Modify External When read, a side effect occurs.

Registers

Register overview

Register Offset TZ Description
DUMMY 0x514

Example of a register controlling a dummy feature

DUMMY

Address offset: 0x514

Example of a register controlling a dummy feature

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 I H G F E D D D C C C B A A
Reset 0x00050002 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0
ID R/W Field Value ID Value Description
A

RW

FIELD0

Example of a read-write field with several enumerated values

Disabled

0

The example feature is disabled

NormalMode

1

The example feature is enabled in normal mode

ExtendedMode

2

The example feature is enabled along with extra functionality
B

RW

FIELD1

Example of a deprecated read-write field

This field is deprecated.

Disabled

0

The override feature is disabled

Enabled

1

The override feature is enabled
C

RW

FIELD2

Example of a read-write field with a valid range of values

ValidRange

[2..7]

Example of allowed values for this field
D

RW

FIELD3

Example of a read-write field with no restriction on the values
E

R

FIELD4

Example of a read-only field
F

W

FIELD5

Example of a write-only field
G

RW
W1C

FIELD6

Example of a write-one-to-clear field
H

RW
W0C

FIELD7

Example of a write-zero-to-clear field
I

RW
RME

FIELD8

Example of a field that causes a side effect when read