nrf52 Proprietary Speeds

Question

The nrf51 was able to use the Gazelle protocol down to 250kbs, giving quite an improvement in sensitivity and range. 
 The nrf52 doesn't mention Gazelle, but does mention 'proprietary protocols', so I'm assuming this is the same. Can you let me know: 
 
 Will a SoftDevice for the nrf52 support a proprietary protocol, like Gazelle, or would we need to develop our own on-air proprietary solution? 
 Does the nrf52 support slower than 1MB/s speeds? 
 
 Overall, the sensitivity on the nrf52 is improved, but want to see if we can boost that further by down-shifting speeds as necessary. 
 Thanks!

MartinBL · Accepted Answer

Hi, 
 
 Yes, the nRF52 will support Gazelle . The radio logic in the nRF52 is actually very similar to the radio logic in the nRF51. The most noticeable changes are the improved link budget and selectivity and we also lowered the radio's operating voltage to reduce the power consumption. So from a software developers perspective the two radios look and feel very similar. 
 No, I'm afraid it only supports 1 and 2 Mbps mode so the nRF52 is not completely backwards compatible with the nRF51 or other legacy devices.