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ADV7391 CVBS output abnormal

Question asked by yangkun on Jan 25, 2016
Latest reply on Jan 26, 2016 by PaulS

hi,I use ADV7391 to do BT656(PAL) input and CVBS output,but the CVBS output is abnormal. Color bar is ok!

 

Register set value as below,


hi_i2c_write(I2C_ADV7391,0x17, 0x02);  //Software reset
msleep(1000);
hi_i2c_write(I2C_ADV7391,0x00, 0x1C);  //All DACs enabled. PLL enabled (16
×).
hi_i2c_write(I2C_ADV7391,0x01, 0x00); //SD input mode

static const unsigned char init_656_PAL[] = {
0x80, 0x11,     /* PAL standard. SSAF luma filter enabled. 1.3 MHz chroma filter enabled.*/
0x82, 0xC3, /* Pixel data valid. CVBS/Y-C (S-Video) out. SSAF PrPb filter enabled. Active video edge control enabled.*/
//0x88, 0x10,
//0x8a, 0x0c,
//0x84, 0x40,     /* enable color bar*/
0x8c, 0xcb, /* Fsc0 */
0x8d, 0x8a, /* Fsc1 */
0x8e, 0x09, /* Fsc2 */
0x8f, 0x2a, /* Fsc3 */ 
};


IMG_4238.JPG



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