https://devzone.nordicsemi.com/f/nordic-q-a/27399/how-to-access-the-ram-of-nrf52832Now I want to access the RAM of nrf52832 with pdm digital microphone, I need to put the RAM data to the RF data buffer,is there any good way to slove the problem? Accroding to the datasheet,the PCM sampes is 16-bit,so is there any need to change it toen-USTelligent Community 13Tue, 21 Nov 2017 08:19:57 GMThttps://devzone.nordicsemi.com/thread/108204?ContentTypeID=1Tue, 21 Nov 2017 08:19:57 GMT137ad170-7792-4731-bb38-c0d22fbe4515:4b64116e-d9b1-4cdf-9192-bb37e1383202MartinBL<p>Hi,</p> <p>The PDM can use <a href="http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.nrf52832.ps.v1.1/pdm.html?cp=2_1_0_42_3#concept_ysq_252_yr">EasyDMA</a> to store samples directly in a buffer at a RAM location of your choise. You can then use <a href="http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.nrf52832.ps.v1.1/radio.html?cp=2_1_0_22_0#concept_dxt_xfj_4r">EasyDMA implemented in the radio</a> to read out the same data from the same RAM location. You don&#39;t need to worry about the bit width of the samples as long as your receiving device knows how to interpret the incoming data.</p> <p>Note however, that only one peripheral can access the same <a href="http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.nrf52832.ps.v1.1/memory.html?cp=2_1_0_7#memory">RAM block</a> at a time so you will need to implement a mechanism that ensures that the PDM fills a buffer in a certain RAM block before the radio reads the data. It is possible to reconfigure the PDM and radio to write/read to/from different RAM blocks at run-time allowing you to switch back and forth between two places in RAM located in different RAM blocks.</p><div style="clear:both;"></div>