I have a custom board with the nRF51822 chip, the chip is set-up with the recommended (CFAC WLCSP schematic with low voltage mode) setup, excluding the external low frequency clock, according to the [nRF51822_PS v3.1].
In this product specification document it is written that the Radio Time between TXEN task and READY event for 2M data-rate is 132 us and 130 us for RXEN.
I measured the timing and indeed it is as specified in the document BUT that is only for the basic proprietary radio protocol. In the case of ESB protocol the timing I measured was around 379 us for the ESB Rx Mode (Between setting the mode to Rx and then calling the nrf_esb_enable, and getting the callback from the nrf_esb_is_enabled()).
This number even jumps to 603 us if I wait for the NRF_RADIO EVENTS_READY instead of the nrf_esb_is_enabled() !!
I want to know if those number are normal ?
also I want to know if nordic semiconductors have official numbers for the timing of switching-on and switching-off the ESB protocol in Tx or Rx mode for me to compare my timings with ?