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AD9889b not output signal for hdmi,help me!!!!!

Question asked by Paullee on Nov 2, 2011
Latest reply on Nov 9, 2011 by Paullee

hi all,

 

 

I'm to use the AD9889B as a HDMI transmitter .

input source is a 1280x720Pp(60HZ ,4:2:2,clk、hync、sync,but no de signal)  color bar.i use mcu control ad9889b via iic bus. Now it can be writed and readed,but hdmi connector do not signal out,HPD is high,It seem that the TMDS drive is not on,clk of tmds do not 74.24mhz on pin of hdmi.how am i to do?

 

here is the read back i2c value:

 

Press 's' to show....                                               
00H   00H 00H 00H 00H 00H 00H 00H 00H 00H 00H 01H 0EH 3CH 18H 01H 13H
10H   25H 37H 00H 00H 00H 02H F0H 03H 06H 62H 04H A8H 00H 00H 1CH 84H
20H   1CH BFH 04H A8H 1EH 70H 02H 1EH 00H 00H 04H A8H 08H 12H 1BH ACH
30H   00H 00H 00H 00H 00H 00H 00H 00H 00H 00H 00H 80H 00H 04H 10H 00H
40H   00H 10H C0H 7EH 78H 00H 00H 00H 00H 00H 00H 00H 00H 00H 00H 00H
50H   00H 00H 00H 00H 00H 00H 00H 00H 00H 00H 00H 00H 00H 00H 00H 00H
60H   00H 00H 00H 00H 00H 00H 00H 00H 00H 00H 00H 00H 00H 00H 00H 00H
70H   00H 00H 00H 00H 00H 00H 00H 00H 00H 00H 00H 00H 00H 00H 00H 00H
80H   00H 00H 00H 00H 00H 00H 00H 00H 00H 00H 00H 00H 00H 00H 00H 00H
90H   00H 00H 00H 00H C0H 00H 24H 00H 07H 02H 00H 18H 38H 61H 12H 70H
A0H   00H 00H 87H 87H 08H 04H 00H 00H 00H 00H 00H 40H 00H 00H 40H 06H
B0H   08H 79H FEH 83H 65H ECH 1EH 67H 10H 00H 00H FFH 00H 00H 00H 00H
C0H   00H 00H 00H 00H 00H 10H 10H 00H 02H 03H 00H 01H 02H 00H 00H 70H

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