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nrf_802154:doc: Update mutliprotocol support documentation
add information about switching multiprotocol timings Signed-off-by: Dawid Przybylo <[email protected]>
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‎nrf_802154/doc/multiprotocol_support.rst‎

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@@ -77,6 +77,136 @@ Because of the nature of the Bluetooth Low Energy protocol (TDMA), the Bluetooth
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.. _rd_multiprotocol_support_hf_clock:
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Protocol and Radio Transition Measurements
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-----------------------------------------
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The system measures two distinct timing metrics during protocol transitions:
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15.4 to BLE Transitions:
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Radio Switching Time:
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- Start: RX_EN pin deactivation (15.4 radio turning off)
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- End: READY pin activation for BLE operation (ble radio turned on and ready)
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- Measures how quickly the radio hardware switches modes
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Protocol Switching Time:
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- Start: First PDN event marking the end of 15.4 activity
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- End: Second PDN event marking the start of BLE activity
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- Captures the full protocol stack transition overhead
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BLE to 15.4 Transitions:
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Radio Switching Time:
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- Start: DISABLED pin event (BLE radio turning off)
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- End: READY pin activation for 15.4 operation (15.4 radio turned on and ready)
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- Measures how quickly the radio hardware switches modes
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Protocol Switching Time:
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- Start: PDN event at the end of BLE activity
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- End: PDN event at the start of 15.4 activity
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- Captures the full protocol stack transition overhead
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The measurements are collected during BLE advertisement, scanning, and connection activities.
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Disclaimer
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----------
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All information and tables below are strictly informational, do not represent requirements, and were measured using Nordic DK development kits.
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Multiprotocol Switching Protocol Mean Value Comparison
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+-------------------+-----------+---------------------+---------------------+---------------------+
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| BLE activity name | Direction | NRF52 Protocol Mean | NRF53 Protocol Mean | NR54L Protocol Mean |
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+===================+===========+=====================+=====================+=====================+
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| advertisement | 15.4→BLE | 257 | 261 | 205 |
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+-------------------+-----------+---------------------+---------------------+---------------------+
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| advertisement | BLE→15.4 | 152 | 181 | 80 |
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+-------------------+-----------+---------------------+---------------------+---------------------+
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| scanning | 15.4→BLE | 251 | 251 | 210 |
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+-------------------+-----------+---------------------+---------------------+---------------------+
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| scanning | BLE→15.4 | 135 | 183 | 76 |
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+-------------------+-----------+---------------------+---------------------+---------------------+
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| connection | 15.4→BLE | 258 | 258 | 214 |
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+-------------------+-----------+---------------------+---------------------+---------------------+
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| connection | BLE→15.4 | 149 | 182 | 80 |
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+-------------------+-----------+---------------------+---------------------+---------------------+
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Multiprotocol Switching Radio Mean Value Comparison
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+-------------------+-----------+------------------+------------------+------------------+
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| BLE activity name | Direction | NRF52 Radio Mean | NRF53 Radio Mean | NR54L Radio Mean |
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+===================+===========+==================+==================+==================+
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| advertisement | 15.4→BLE | 324 | 346 | 268 |
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+-------------------+-----------+------------------+------------------+------------------+
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| advertisement | BLE→15.4 | 289 | 335 | 172 |
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+-------------------+-----------+------------------+------------------+------------------+
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| scanning | 15.4→BLE | 303 | 315 | 256 |
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+-------------------+-----------+------------------+------------------+------------------+
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| scanning | BLE→15.4 | 234 | 292 | 150 |
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+-------------------+-----------+------------------+------------------+------------------+
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| connection | 15.4→BLE | 386 | 388 | 348 |
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+-------------------+-----------+------------------+------------------+------------------+
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| connection | BLE→15.4 | 333 | 398 | 211 |
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+-------------------+-----------+------------------+------------------+------------------+
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NRF52 Multiprotocol Switching Measurements
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+-------------------+-----------+-----------------------------------+--------------------------------+
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| BLE activity name | Direction | Protocol Switching (min/mean/max) | Radio Switching (min/mean/max) |
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+===================+===========+===================================+================================+
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| advertisement | 15.4→BLE | 238/257/359 | 305/324/427 |
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+-------------------+-----------+-----------------------------------+--------------------------------+
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| advertisement | BLE→15.4 | 136/152/163 | 273/289/299 |
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+-------------------+-----------+-----------------------------------+--------------------------------+
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| scanning | 15.4→BLE | 235/251/265 | 287/303/317 |
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+-------------------+-----------+-----------------------------------+--------------------------------+
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| scanning | BLE→15.4 | 133/135/141 | 232/234/239 |
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+-------------------+-----------+-----------------------------------+--------------------------------+
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| connection | 15.4→BLE | 243/258/275 | 372/386/398 |
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+-------------------+-----------+-----------------------------------+--------------------------------+
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| connection | BLE→15.4 | 135/149/165 | 312/333/354 |
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+-------------------+-----------+-----------------------------------+--------------------------------+
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NRF53 Multiprotocol Switching Measurements
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+-------------------+-----------+-----------------------------------+--------------------------------+
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| BLE activity name | Direction | Protocol Switching (min/mean/max) | Radio Switching (min/mean/max) |
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+===================+===========+===================================+================================+
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| advertisement | 15.4→BLE | 236/261/420 | 320/346/505 |
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+-------------------+-----------+-----------------------------------+--------------------------------+
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| advertisement | BLE→15.4 | 169/181/197 | 324/335/352 |
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+-------------------+-----------+-----------------------------------+--------------------------------+
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| scanning | 15.4→BLE | 234/251/265 | 298/315/328 |
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+-------------------+-----------+-----------------------------------+--------------------------------+
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| scanning | BLE→15.4 | 181/183/196 | 290/292/305 |
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+-------------------+-----------+-----------------------------------+--------------------------------+
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| connection | 15.4→BLE | 244/258/275 | 375/388/401 |
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+-------------------+-----------+-----------------------------------+--------------------------------+
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| connection | BLE→15.4 | 167/182/196 | 379/398/418 |
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+-------------------+-----------+-----------------------------------+--------------------------------+
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NR54L Multiprotocol Switching Measurements
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+-------------------+-----------+-----------------------------------+--------------------------------+
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| BLE activity name | Direction | Protocol Switching (min/mean/max) | Radio Switching (min/mean/max) |
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+===================+===========+===================================+================================+
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| advertisement | 15.4→BLE | 118/205/209 | 184/268/273 |
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+-------------------+-----------+-----------------------------------+--------------------------------+
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| advertisement | BLE→15.4 | 79/80/80 | 171/172/173 |
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+-------------------+-----------+-----------------------------------+--------------------------------+
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| scanning | 15.4→BLE | 209/210/211 | 255/256/257 |
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+-------------------+-----------+-----------------------------------+--------------------------------+
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| scanning | BLE→15.4 | 75/76/77 | 149/150/150 |
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+-------------------+-----------+-----------------------------------+--------------------------------+
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| connection | 15.4→BLE | 212/214/223 | 345/348/348 |
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+-------------------+-----------+-----------------------------------+--------------------------------+
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| connection | BLE→15.4 | 79/80/80 | 195/211/225 |
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+-------------------+-----------+-----------------------------------+--------------------------------+
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Handling high-frequency clock
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*****************************
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