When TX ON command is issued ADF7030-1 will take some time to transmit payload (PA ramp up to last bit of CRC transmission). while packet ius being transmitted , can host write TX buffer memory or host has to wait for transmission to be completed.
Hi,Yes, the host (MCU) can write to the TX buffer of the radio while the radio is transmitting a payload, but it is highly not recommended.
For example, when using the ADuCM4050 as the host with a set SPI clock frequency of 6.5MHz, the host writes to the radio faster than the radio can transmit its payload. This causes corruption of the payload intended for the receiver.