AnsweredAssumed Answered

ADSP 21489 at 8kHz sample rate

Question asked by jiangang on May 17, 2016
Latest reply on Jan 3, 2017 by dspcoder



I currently got a adsp 21489 EZLITE, and want to configure the sample rate from 48khz to 8khz in the example AD1939 C Block-Based Talkthru code.


From the datasheet of ad1939, it claims that it supports 8k-192khz sample rate. And I found this article in previous discussion: AD193x family - supporting Sample Rates lower than 32 kHz


I tried to modify the code in init1939viaSPI.c:

Setting the clock control registers to the following:

            (AD1939_ADDR), CLKCTRL0, 0x81,

            (AD1939_ADDR), CLKCTRL1, 0x03,


Unfortunately, it doesn't work for the board. Any pointer or guide to help me how to configure the sample rate to 8khz. Thanks a lot.