https://devzone.nordicsemi.com/f/nordic-q-a/82552/nrf52840-ram-sizeHello, I&#39;m struggling to understand the available RAM size in that chip. After reading the product specification v1.7, the RAM specification is described as follow: In the section 4.2 Memory the RAM size is specified as 256 kB RAM: The nRF52840en-USTelligent Community 13Thu, 09 Dec 2021 09:14:53 GMThttps://devzone.nordicsemi.com/thread/342647?ContentTypeID=1Thu, 09 Dec 2021 09:14:53 GMT137ad170-7792-4731-bb38-c0d22fbe4515:5ea37c0c-181f-4f6d-b4b4-965eb76dd15bSigurd<p><a href="https://infocenter.nordicsemi.com/topic/ps_nrf52840/memory.html">https://infocenter.nordicsemi.com/topic/ps_nrf52840/memory.html</a></p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/342609?ContentTypeID=1Wed, 08 Dec 2021 21:03:54 GMT137ad170-7792-4731-bb38-c0d22fbe4515:cec8dadd-afd2-42dc-9073-50af5ede0b61joel-sc<p>Where can I found this information in the product specification ?</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/342607?ContentTypeID=1Wed, 08 Dec 2021 20:57:20 GMT137ad170-7792-4731-bb38-c0d22fbe4515:64fb84a6-7230-4d2e-9214-a151ee0bc34aSigurd[quote user=""]The RAM interface is divided into nine RAM AHB slaves.<br />RAM AHB slaves 0 to 7 are connected to <strong>two</strong> 4 kB RAM sections each, while RAM AHB slave 8 is connected<br />to six 32 kB sections, as shown in Memory layout on page 21[/quote][quote user=""]Where the total size is 8 * 4K + 6 * 32k = 229376 which is not equal to 256K (262144).[/quote] <p>There&nbsp;are 2 of those 4kB section for the 0 to 7 RAM AHB slaves, so 8*2*4*1024+6*32*1024 =&nbsp;<span>262144</span></p><div style="clear:both;"></div>