Entering updater mode

AN4491

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Entering updater mode

The updater can be started in two different ways:

 Through the ACI command, when in normal operation (see Section 6.1: Updater_Start).

 Using the IRQ pin during hardware reset. If the IRQ pin is detected high during BlueNRG

startup (power-up or hardware reset), BlueNRG enters updater mode. The startup phase

of BlueNRG (hardware and firmware) takes about 3 ms. To be sure that IRQ is detected

high during startup, it is recommended to keep it high for at least 4 ms after Reset has

been released.