LPCXpresso IDE中的主题 I2S 24Bit https://community.nxp.com/t5/LPCXpresso-IDE/I2S-24Bit/m-p/539726#M6620 <HTML><HEAD></HEAD><BODY><STRONG>Content originally posted in LPCWare by Natanael on Tue Apr 15 14:08:09 MST 2014</STRONG><BR /><SPAN>Hi,</SPAN><BR /><BR /><SPAN>Does anybody know, if it is possible to run a 24-Bit Audio DAC (I2S) with the LPC1769 (offers only 8-, 16- 32-Bit I2S Mode) ?</SPAN><BR /><BR /><SPAN>Thank you ! Natanael.</SPAN></BODY></HTML> Wed, 15 Jun 2016 21:52:57 GMT lpcware 2016-06-15T21:52:57Z I2S 24Bit https://community.nxp.com/t5/LPCXpresso-IDE/I2S-24Bit/m-p/539726#M6620 <HTML><HEAD></HEAD><BODY><STRONG>Content originally posted in LPCWare by Natanael on Tue Apr 15 14:08:09 MST 2014</STRONG><BR /><SPAN>Hi,</SPAN><BR /><BR /><SPAN>Does anybody know, if it is possible to run a 24-Bit Audio DAC (I2S) with the LPC1769 (offers only 8-, 16- 32-Bit I2S Mode) ?</SPAN><BR /><BR /><SPAN>Thank you ! Natanael.</SPAN></BODY></HTML> Wed, 15 Jun 2016 21:52:57 GMT https://community.nxp.com/t5/LPCXpresso-IDE/I2S-24Bit/m-p/539726#M6620 lpcware 2016-06-15T21:52:57Z Re: I2S 24Bit https://community.nxp.com/t5/LPCXpresso-IDE/I2S-24Bit/m-p/539727#M6621 <HTML><HEAD></HEAD><BODY><STRONG>Content originally posted in LPCWare by Tsuneo on Thu Apr 17 14:17:17 MST 2014</STRONG><BR /><SPAN>You may send 24bits data (MSB first) with 8bits padding over 32bits word</SPAN><BR /><BR /><SPAN>The I2S spec allows this format.</SPAN><BR /><HR /><SPAN style="color: #0000ff;"><STRONG>Quote: </STRONG><BR /><BR /><A href="http://https://www.sparkfun.com/datasheets/BreakoutBoards/I2SBUS.pdf">https://www.sparkfun.com/datasheets/BreakoutBoards/I2SBUS.pdf</A><BR /><BR />3.1 Serial Data<BR />Serial data is transmitted in two’s complement with the MSB first. The MSB is transmitted first because the transmitter and receiver may have different word lengths. It isn’t necessary for the transmitter to know how many bits the receiver can handle, nor does the receiver need to know how many bits are being transmitted.<BR /><BR />When the system word length is greater than the transmitter word length, the word is truncated (least significant data bits are set to '0') for data transmission. <STRONG>If the receiver is sent more bits than its word length, the bits after the LSB are ignored.</STRONG><BR /></SPAN><HR /><BR /><BR /><SPAN>Also, most of 24bit I2S DACs accept this format.</SPAN><BR /><SPAN>For example, look at "Figure 4: Mode 3 Timing" (Mode 3: 24bit I2S compatible) on AK4399 data sheet.</SPAN><BR /><A href="http://http://www.akm.com/akm/en/file/datasheet/AK4399EQ.pdf">http://www.akm.com/akm/en/file/datasheet/AK4399EQ.pdf</A><BR /><BR /><SPAN>Tsuneo</SPAN></BODY></HTML> Wed, 15 Jun 2016 21:52:58 GMT https://community.nxp.com/t5/LPCXpresso-IDE/I2S-24Bit/m-p/539727#M6621 lpcware 2016-06-15T21:52:58Z