NRF7002-CEAA-R7 datasheet(51/69 Pages) NORDIC

51 / 69 page

Hardware and layout

Figure 30: Bottom layer

14.3.5 Supply sequencing requirements

The various supplies and BUCKEN need to be sequenced in order with delay requirements.

The power up sequence and requirements are:

• Supply VBAT/BUCKVBAT/BUCKVBATS/AFEVBAT

• Wait ≥ 6 ms

• Assert BUCKEN

• Wait ≥ 1 ms

• Supply IOVDD

PWRIOVDD is an internally generated supply, used for supplying OTPVDD through an external connection.

It cannot be used for anything else. This supply is automatically controlled in the device.

The power-down sequence and requirements are:

• De-assert BUCKEN and power down IOVDD

• Power down VBAT

There are no specific timing delay requirements as long as the sequence is correct.

14.3.6 Supply system alternatives

nRF7002 can be powered up/down from a host dynamically. This dynamic control uses the BUCKEN pin

and an external switch to control the IOVDD supply. Both the BUCKEN pin and the external switch control

are driven from a GPIO on the host, controlled by the Wi-Fi driver.

There are two options (high voltage and normal voltage) for connecting nRF7002 to an nRF5340 host,

supporting dynamic powerup/powerdown of the nRF7002. This dynamic control utilises an external switch

to control the IOVDD supply.

The following figure shows the recommended connection between nRF7002 and the host MCU (nRF5340).

4486_184 v1.2

NRF7002-CEAA-R7 Fiches technique(PDF) 51 Page - Nordic Semiconductor