AnsweredAssumed Answered

AD7656-1 serial mode, spi dout no signal

Question asked by chienchunchen@gmail.com on May 14, 2018
Latest reply on May 20, 2018 by jcolao

Hi, 

i refer to AN-893 and configure AD7656-1EVM as serial port with hardware mode.

but i havent found any output on dout pins, and i can see the busy output.

 

my configure as below description to tie DGND.

 

to use wires to short RESET to VDRIVE as reset.

WR tie VDRIVE.

RD tie to DGND

short CONVT_a, -b, and _c, that drive by mcu.

sclk drive 6MHz clk.

there are still no any signals on dout.

does anyone have the same issue? 

we use  EVAL-SDP-CB1Z w/ AD7656-1EVM, it works fine in hw mode w/ parallel bus before.

 

Sean

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