NRF7002-CEAA-R7 datasheet(22/69 Pages) NORDIC

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8 Coexistence

nRF70 Series devices have a highly configurable coexistence hardware to help mitigate interference

between WLAN and Bluetooth LE/IEEE 802.15.4 devices (Thread, Zigbee).

A Packet Traffic Arbitration (PTA) module, connected to the CH logic function, facilitates the mitigation of

various interference scenarios through a highly-programmable fabric. The coexistence hardware enables

flexible output signals that support interface configurations like 3-wire and 4-wire. The primary schemes

supported are:

• Shared Antenna mode – The PTA makes priority decisions, controls the switch between Bluetooth

LE/IEEE 802.15.4 and Wi-Fi. The PTA also grants TX/RX requests from the Bluetooth LE/IEEE 802.15.4

device. Only one interface, either Bluetooth LE/IEEE 802.15.4 or or Wi-Fi is connected to the antenna

at any time.

• Separate Antenna mode – The PTA makes priority decisions, granting TX/RX requests from Bluetooth

LE/IEEE 802.15.4. Each interface is permanently connected to its own antenna.

The following figure shows the architecture of the coexistence hardware with details about the PTA control

lines.

nRF70 Series

Wi-Fi

PTA

COEX

Ctrl

Logic

Ant

Switch

Control

Host I/F

COEX HW

COEX_GRANT

COEX_STATUS0

COEX_REQ

SW_CTRL0

COEX_STATUS1/

SW_CTRL1

Figure 13: Coexistence hardware architecture

4486_184 v1.2

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