NRF7002-CEAA-R7 datasheet(24/69 Pages) NORDIC

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Coexistence

8.1 Bluetooth LE/IEEE 802.15.4 timing

This section provides Bluetooth LE/IEEE 802.15.4 timing diagrams and parameters.

3-wire with multiplexed priority

The following diagram shows external Bluetooth LE/IEEE 802.15.4 timing parameters when SR_STATUS

carries both priority and TX/RX information in a time multiplexed manner.

SR_REQUEST

SR_REQUEST lead time

Transaction time

t3 t4

time

Tx/Rx

SR_STATUS

Priority

SR_GRANT

Grant

Figure 14: 3-wire timing with priority multiplexing

Parameter

Description

T1: SR_REQUEST lead time period The time SR_REQUEST is asserted before actual transactions.

T2: SR_STATUS

The time when SR_STATUS is sampled to get SR_PTI information.

T3: SR_GRANT

The time before PTA should post SR_GRANT so that it is stable to be

considered by the Bluetooth LE/IEEE 802.15.4 device.

Table 7: Bluetooth LE/IEEE 802.15.4 timing parameters

The Bluetooth LE/IEEE 802.15.4 timing parameters are used to derive PTA timing parameters. The

following table describes the relationship between PTA timing parameters and Bluetooth LE/IEEE 802.15.4

timing parameters.

PTA timing parameter

Relation with Bluetooth LE/IEEE 802.15.4 timing

parameter

Bluetooth LE/IEEE 802.15.4 device status priority

sampling time (t2)

t1 < t2 < (t1+T2)

PTA arbitration decision time (t3)

(t1+T2) < t3 < (T1-T3)

Table 8: PTA and Bluetooth LE/IEEE 802.15.4 timing parameters

4486_184 v1.2

NRF7002-CEAA-R7 Datasheet(PDF) 24 Page - Nordic Semiconductor