https://devzone.nordicsemi.com/f/nordic-q-a/48081/nrf51-rom-and-ram-optimizationHello, community. I&#39;m using NRF51822 SoC(256KB ROM, 32KB RAM) with S130 Softdevice. I&#39;d like to reduce the rom size and the ram size to decrease the production cost. if it is possible, we want to use 128KB ROM and 16 KB RAM. My questions are twoen-USTelligent Community 13Mon, 03 Jun 2019 12:24:26 GMThttps://devzone.nordicsemi.com/thread/190505?ContentTypeID=1Mon, 03 Jun 2019 12:24:26 GMT137ad170-7792-4731-bb38-c0d22fbe4515:e324987c-79b6-4187-b514-59f820aee084Einar Thorsrud<p>Hi,</p> [quote user=""]1. Softdevice Flash size can be reduced?[/quote] <p>The flash size is fixed for each SoftDevice version. You could consider using S110 if the S130 is too big for your application.</p> [quote user=""]2. Softdevice Ram size range?[/quote] <p>&nbsp;The SoftDevice RAM usage depends on configuration. You can refer to <a href="https://devzone.nordicsemi.com/nordic/short-range-guides/b/getting-started/posts/adjustment-of-ram-and-flash-memory">Adjustment of RAM and Flash memory</a> for details.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/190441?ContentTypeID=1Mon, 03 Jun 2019 08:53:49 GMT137ad170-7792-4731-bb38-c0d22fbe4515:d9b4e1a5-7517-41f6-89c6-e9eaa3559184alan.kim<p>One more question. Could i see the value of total ram usage by any function?</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/190437?ContentTypeID=1Mon, 03 Jun 2019 08:46:46 GMT137ad170-7792-4731-bb38-c0d22fbe4515:8e2a283f-626e-4055-8cbf-33fbea4bd66calan.kim<p>it seems like that the ramsize depends on&nbsp;NRF_FICR-&gt;SIZERAMBLOCKS and&nbsp;NRF_FICR-&gt;NUMRAMBLOCK. Is there no problem if i change the value?</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/190433?ContentTypeID=1Mon, 03 Jun 2019 08:34:19 GMT137ad170-7792-4731-bb38-c0d22fbe4515:35c9a82a-acad-4144-93e2-981d91f22f69alan.kim<p>Ramsize: SDH:DEBUG:sd_ble_enable: RAM start at 0x200026b0</p><div style="clear:both;"></div>