MODECNF0

nRF5340 Product Specification

Address offset: 0x650

Radio mode configuration register 0

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 B B A
Reset 0x00000200 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0
ID R/W Field Value ID Value Description
A

RW

RU

Radio ramp-up time

Default

0

Default ramp-up time (tRXEN and tTXEN), compatible with firmware written for nRF51

Fast

1

Fast ramp-up (tRXEN,FAST and tTXEN,FAST), see RADIO timings for more information

When enabled, TIFS is not enforced by hardware and software needs to control when to turn on the Radio

B

RW

DTX

Default TX value

Specifies what the RADIO will transmit when it is not started, i.e. between:

RADIO.EVENTS_READY and RADIO.TASKS_START

RADIO.EVENTS_END and RADIO.TASKS_START

RADIO.EVENTS_END and RADIO.EVENTS_DISABLED

For IEEE 802.15.4 250 kbps mode only Center is a valid setting

For Bluetooth Low Energy Long Range mode only Center is a valid setting

B1

0

Transmit '1'

B0

1

Transmit '0'

Center

2

Transmit center frequency

When tuning the crystal for center frequency, the RADIO must be set in DTX = Center mode to be able to achieve the expected accuracy