NRF52833 programming speed

[BenSiso]

I am trying to speed up the burning process.

I am using JLink ULTRA+ (swd max speed 50Mhz) and Jlink base(swd max speed 30Mhz) and NRF52833 but still get almost the same SWD time.

Can the 833 swd max speed be the bottleneck? What is 833 swd max speed?
Thanks!

[Kenneth]

The SWDCLK speed is max 8MHz: https://infocenter.nordicsemi.com/topic/ps_nrf52833/dif.html#unique_1971478971

You don't write anyting about which nrfjprog command you are executing and what time you measure? It do take some time to erase, program and verify yes.

You may consider having two programmers in paralell if the speed does not meet your requirements.

Best regads,
Kenneth

[BenSiso]

Thanks for the fast responding.

I burn 16 times same hex on same product(not parallelly).

commands and total time:

nrfjprog --family NRF52 --reset --sectorerase --program rev4.hex

ultra+     03:18.667890 (3 min,18 sec...)

base       03:19.439892

nrfjprog --family NRF52 --reset --chiperase --program rev4.hex

ultra+     40.858601 (40 sec..)

base       41.500295

 

nrfjprog  --reset --chiperase --program rev4.hex 

ultra+     42.461306​

base       43.040684


Do you have any idea ,besides having two programmers in parallel, to make it faster ?

Thanks,

Ben

[Kenneth]

I did a test here, and measured about ~20seconds on an nRF52833-DK:

The dump.hex is the entire flash of the nRF5233.

Best regards,
Kenneth