NRF9160-SIBA-R datasheet(12/400 Pages) NORDIC

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2.3 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.

2.3.1 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

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.

2.3.2 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:

Access

Description

Hardware behavior

Read-only

Field can only be read. A write will be ignored.

Write-only

Field can only be written. A read will return an undefined value.

Read-write

Field can be read and written multiple times.

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.

Table 2: Register field permission schemes

2.4 Registers

Offset

Description

DUMMY

0x514

Example of a register controlling a dummy feature

Table 3: Register overview

4418_1315 v2.0

NRF9160-SIBA-R Datasheet(PDF) 12 Page - Nordic Semiconductor

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