AnsweredAssumed Answered

Sequencer speed problem

Question asked by pado16core on Oct 9, 2015
Latest reply on Oct 14, 2015 by pado16core

Friends,

 

We have made a lot of progress integrating the ADuCM350 into our board. Thank you for the help so far!

 

I have encountered a strange problem, where timing the following sequence takes around 200us. Note that the only delays in the sequence accumulate to 6.75 usec. Why are the delays so long? Am I doing something wrong?

 

Thanks!

 

0x000B006B,/*  0 - Safety Word, Command Count = 11, CRC = 0x6B */
0x82000003,/*  1 AFE_SEQ_CFG */
0x84001F18,/*  2 – AFE_FIFO_CFG, DATA_FIFO_EN=1,DATA_FIFO_THR_VAL=111,CMD_FIFO_EN=1 */
0x80020EB0,/*  3 AFE_CFG */
0xA0000302,/*  4 AFE_ADC_CFG */
0xA6000003,/*  5 AFE_SW_FULL_CFG_LSB*/

0x86020000,   /*  6 - AFE_SW_CFG: SW_SOURCE_SEL = 1 */      

0x00000008,/*  7 wait 0.5us */
0x80020FB0,/*  8 AFE_CFG ADC_CONV_EN = 1 */
0x00000064,/*  9 wait 6.25us – settling time for decimation filter @ 160KHz */
0x80020FB0,/*  10 AFE_CFG ADC_CONV_EN = 0 */
0x82000002  /* 11 - AFE_SEQ_CFG: SEQ_EN = 0 */     

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