Hi We have some design issues with interfacing DM6467 McASP to a third party DAC.(CS4353- A paasive DAC with stereo output) We actually tried to replace AIC33 with CS4353. In the board which uses AIC33 , McASP is receiving Serial clk and FS from AIC33. But in our board, we can't provide Serial clk and FS from DAC and hence McASP gives FS to DAC . Serial clock is provided by a CDCE949 clk synthesizer. (I have attached the connection diagram). The problem is , the FS generated by McASP is governed by the follwoing relationship FS= Serial clk/(slot size * No of Slots) I have given serial clk=256KHz, slot size=32, I2S and FS=4KHz. And I get the output quite normally. I am confused in this. 1) How can a data (speech )sampled at 8KHz, 16 bit sample width plays normally at FS= 4KHz? If I change the slot size to 16 bit , FS becomes 8 KHz, and the audio plays at double speed. 2) Why is it like that? Pls help
Jayakrishnan M M Research Engineer R&D Team-2 , Group-5 Security Solutions Division SAMSUNG TECHWIN CO.,LTD TEL +82-70-7147-8482 FAX +82-31-8018-3712 Mobile +82-10-6409-3619 E-mail:[email protected] <img src='http://ext.samsung.net/mailcheck/SeenTimeChecker?do=b9201a3ec71f120a9dc964b20e1d6cedb63ffa340be1d5ba44c26a66f18aa08bcce5e516161401cc9c32f6c4c9345bd3745cd22ca5f3b0788945cf8dfc8cc7cb8a2769b5088e593e5f96817860e2d78ddb9fdddda33e82cbe4a391424e62fcf6cf878f9a26ce15a0' border=0 width=0 height=0 style='display:none'>
Audio Interface.doc
Description: Binary data
_______________________________________________ Davinci-linux-open-source mailing list [email protected] http://linux.davincidsp.com/mailman/listinfo/davinci-linux-open-source
