NRF7002-CEAA-R7 datasheet(7/69 Pages) NORDIC

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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 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.

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.

W1C

Write 1 to clear

Field can be read multiple times. Bits set to 1 clear (set to zero) the corresponding bit in the register. Bits set to 0 are ignored.

W1S

Write 1 to set

Field can be read multiple times. Bits set to 0 clear (set to zero) the corresponding bit in the register. Bits set to 1 are ignored.

Table 2: Register field permission schemes

4486_184 v1.2

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